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First try sandblasting.

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Thad in AR. View Drop Down
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    Posted: 16 Jul 2011 at 6:18pm
I have had a blast cabinet for a few years but I finally bought a pressure pot. I have 3 bags of black beauty that I use in the cabinet will it work good in the pressure pot? I also have several buckets of dry sifted sand. I hope to blast my wc fenders and hood in the morning. I just bought a cheap blast hood from harbor freight and was thinkin of using my paint respirator under it. I tried the sand in the cabinet and even with a shop vac hooked up it created so much dust I can't see anything. The black beauty worked much better in the cabinet. Any advice will be appreciated.
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Auntwayne View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Auntwayne Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 6:33pm
      When Ryan Renko gets back from the farm tonight, he will post and let you know every thing you need to know, we sand blasted all night last night . He is out there painting his D-17 right now.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TMiller/NC Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 6:53pm
Set a fan behind you blowing the sand away from your face and body.  Helps a lot.  Tim
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GBACBFan Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 8:03pm
Mike Noonan from this site introduced me to the fundamentals of sandblasting this summer. He predicted I would end up with sand in every oriface, and he was absolutely correct!
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Ryan Renko View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 8:21pm
Thad, I am by no means an expert but do like the results sand blasting will give. I spread out a plastic tarp in the yard in a attempt to reuse whatever media I can. I was using silica sand which I buy for about $6.00 a bag at Ace hardware. The Black Beauty was costing me $20.00 for a 100lb bag which I thought was high. The Black Beauty is way more aggressive than the silica sand. If you attempt to reuse the media use a small screen to sift out the debris or you will be clogging it up. Wearing a respirator and face shield is a must. I was just cleaning up some D17 parts, not doing the Golden Gate Bridge or something like that. Hopefully others will chime in and not rag at me. Ryan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TedBuiskerN.IL. Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 8:48pm
Be very careful sandblasting sheet metal, you can actually lengthen the hood if not done carefully.  My 45 diesel hood is a hard fit due to being too aggressive with the sand blaster.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 8:52pm
Was real supprised to see how well Dry Ice blasting works when I was going into refinreys . The dry ice presents no clean up problem like sand in finding places to get into , the only thing to clean up is the material removed.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CTuckerNWIL Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jul 2011 at 9:02pm
I think I would be careful using the Black Beauty on sheet metal. I have never used it but it could be a might aggressive. Guys at work think if 90 psi on the media cabinet works, then 130 has to be better. It's not. It will eat up your media and you end up with a cabinet full of dust. I have a cheap Harbor Freight pressure pot. If I let my compressor breathe once in awhile it does a pretty good job. I wish I had a cabinet for smaller things. Every time I use the one at the shop, I have to put a new window in to see. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amac Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 11:36am
recycled media will get dusty and adds to the visibility problems. The good thing is that the media that you use the second time around isn't as aggressive and will work better on the tin work.
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Thad in AR. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thad in AR. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 12:46pm
I got one fender done. The black beauty was too agressive. The sand worked better but I had a lot of problems with the pressure pot. It kept plugging up. I sifted the sand each time but still had problems. When I was done (so hot I was soaking wet and couldn't see out the window from humidity) I turned the pot over and emptied it in a bucket and shot air backwards through the blast hose I found 2 or 3 pieces of styrofoam packing on top of the sand. I think it'll work better next time. I found that I could use a smaller nozel with the sand and it didn't require as much air.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote outlook6 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 2:22pm
I sand blast in my back yard as well and in addition to using a tarp to recover and reuse as much sand as possible, I bought a plastic 55 gallon drum (The kind they use to ship cooking oil).  I cut out the top of the barrell and placed a piece of expanded metal over it.  I place whatever I'm stripping on the expanded metal and blast downward.  A good bit of the sand collects in the barrell to be used again.  A strainer to screen the sand before you reuse it is a must however.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 8:09pm
Sometimes even with a water trap humidity affects the media and can make a clog.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian Jasper co. Ia Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 8:46pm
Sounds like your pressure pot is better or maybe bigger than mine. Mine only holds 100lbs at a time and the B.B. just clogs up. I do use the B.B. in my cabinet and it works well. I haven't had trouble with dust at all. I'm using a big Craftsman shop vac on mine. The only complaint I have is the gloves didn't last long on mine.
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Thad in AR. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Thad in AR. Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 8:56pm
Brian the B.B. clogs up in mine also. I had to use a wore out nozel with near 3 1/6 to a 1/4 hole. My compressor wouldn't keep up. It also had styrofoam peanuts in the bottom which caused  red face and poor word choice. I'll give it one more try with new sand and less humidity and not so hot. If not I'll drag out the Bosch grinder and wire brush again.
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Ryan Renko View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ryan Renko Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 9:11pm
Dont get discouraged. Sand blasting does a GREAT JOB of cleaning metal!!! Buy a good/great air compressor and keep at it. It leaves a surface thats great for priming and painting. I wire brush some small things but the big stuff gets blasted!!! Ryan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dipstick In Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jul 2011 at 9:27pm
My experience has been that "dry" air is as critical in blasting as it is in painting. Little clots of water will mix with the media and cause uneven feeding. In painting thats probably the number one factor behind fisheyes. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Clay Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 2011 at 7:01am
Orschelen's had Black Diamond (Black Beauty) for $7.49/bag last week.  Tractor Supply has Black Diamond for $7.99.  Northern Tool also has Black Diamond.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Stan IL&TN Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 2011 at 7:55am
I'll also mention that if your compressor is not quite big enough that you can also buy another compressor and connect them both together to get more air capacity.  This was my route as my compressor worked fine but wasn't big enough.  I waited and found a good deal on a 32 gallon unit and then hooked them together on the same feed line to the blast gun.  As I blast one compressor will kick on first and if I keep blasting the second one will kick in and both will run.  It works good for me as I didn't want to buy a new huge compressor for my blasting.

Edited by Stan IL&TN - 18 Jul 2011 at 7:56am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike56073 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 2011 at 10:16am
    I run a 80 galllon compressor with 32 CFM, it sounds like alot but when you're blasting on a hot humid day the compressors efficiency goes way down!
     A water seperator inline is an absolute must!  I used to have one mounted on the wall, but even that wasn't good enough. I would still get water condensing in the airhose to the blaster.  I now have a drier mounted directly to my pressure pot, that seems to work the best.  Also another trick I've learned is to open the drain on the water separator just enough to let the water dribble out as it's collected.
      Two other things with the pressure pot, if it has a 1/2" fitting use 1/2" hose, with a sandblaster air volume is just as important as the pressure.  I run around 85-90 psi at the pressure pot.  The other thing is to make sure you drain your compressor every night, the best thing to do is to install an automatic drain.  My 2 cents...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DonDittmar Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jul 2011 at 11:01am
<iframe width="425" height="349" src="http://www.youtube.com/embed/X5iN7A4KnMA" frameborder="0" allowfullscreen></iframe>
This is my blasting compressor. It has went through a couple of changes since this video, and I have more changes planned. I also have a cabinet as well. I blast everything when I redo a tractor. Compressor is either 42 or 48cfm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Toneman1 Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2011 at 11:55am
Just curious a bit here, has anyone tried using the "recycled" glass media on tractor sheet metal.  I recently used it on some sickle bar parts and found it worked real well, plus there was almost no dust, and as it is recycled from glass there are no issues with silicosis as there may be with sand.  Cost is about 6-8 bucks a bag depending on where you get it.
Thanks,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DonDittmar Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2011 at 12:26pm
There are alot of different blast medias out there, I like 30/60 fine Black Beauty which I buy from the hardware at 11.99/80lb bag. I do not have trouble with sheetmetal warping or stretching, the key to that is you cant hold the nozzle in one place, you have to keep moving.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amac Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2011 at 3:12pm
Originally posted by Toneman1 Toneman1 wrote:

Just curious a bit here, has anyone tried using the "recycled" glass media on tractor sheet metal.  I recently used it on some sickle bar parts and found it worked real well, plus there was almost no dust, and as it is recycled from glass there are no issues with silicosis as there may be with sand.  Cost is about 6-8 bucks a bag depending on where you get it.
Thanks,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amac Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2011 at 3:25pm
Glass beads are a safer alternative when blasting sheet metal. It will take longer and you will probably use more media but when your blasting sheet metal there's no hurry. Also, glass isn't much good if you recycle and use it the second time. With my commercial blaster it helps to stay back 3 feet or so from the sheet metal. The paint and rust comes off slow but it's still faster than a DA sander.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brad Kelley Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2011 at 3:37pm
I like to use glass beads in the small cabinent blaster.  It is great for small parts, nuts, bolts, washers, small brackets, and it feeds better through the small nozzle, gun, and suction hose.  The larger cabinets with the big suction hoses can use silica.  The big outdoor pot blasters are good for doing the big parts and I use black beauty or silica.  I haven't done a lot of sheet metal, but I know the pros recommend soda blasting sheet metal to prevent warping or cutting the metal.  I've even seen the glass beads in the small cabinet seem to "move" metal if I hold the gun in one spot too long, but the soda blasters are much better at stripping paint but not doing damage to the metal.  Save yourself some trouble and use a scraper to remove any heavy paint runs or globs, dried grease, melted rubber, tar, or anything else that's thick and soft.  The blast media will just bounce off that stuff and you'll waste time and media trying to cut through it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amac Quote  Post ReplyReply Direct Link To This Post Posted: 19 Jul 2011 at 3:56pm
baking soda would be the best but you need to be equipped. In a regular pressure pot it doesn't want to feed down too well and if it gets any moisture at all you've got a mess.
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