Sand Blasting Material
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Junior User
Joined: Aug 2006
Posts: 98
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From: Rushville, New York
Sand Blasting Material
I have done "Sand" blasting be for and have used Silica, Sand, and glass beads. But my blasting experience is mainly on heavy metal. My question is when working with body panels on a 77 would one material be better than another. Or is it just a matter of speed and distance. I plan on doing the frame, no problem there and the body. I just don't want to blow holes in things.
Thanks AL
Thanks AL
Post Fiend
Joined: Jul 2006
Posts: 6,948
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Plastic media works well with little harmfull effect on the project you are working on. It will not move any metal material. The other option is walnut shell media. It too is used with softer materials that sand may be too coarse for. Often used in the aircraft industry when aluminum panels need to be blasted.
Oh yeah, this alternative media is not cheap.
Oh yeah, this alternative media is not cheap.
Senior User
Joined: Dec 2006
Posts: 408
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From: Emmett, ID
Walnut is the way to go, when i was in high school, i took a small engines class and we had to repaint the lawn mower we were rebuilding the engine on, of course as you know the lower part of the mower is colored, and very brittle like the parts of our pick-ups. We had to use the walnut media which is very abrasive but gental on sheet metal materials like fenders, wheel wells etc. It will get off any sign of any paint in any area in which you spray, the closer you go the more paint it will scrub so if there are places you dont want to get sprayed i would suggest that you tape those sections off.
Laughing Gas
Joined: Sep 2006
Posts: 791
Likes: 62
From: Backwoods of western Pa
Will the walnut shells remove surface rust? On my 79 doors, I have some spots of surface rust with some pitting that formed under the race track moulding (no holes) and need to remove it without warping the sheetmetal. Any thoughts? I have regular sand in my blaster but am afraid because I hear that it is easy to warp the sheetmetal with sand.
Senior User
Joined: Dec 2006
Posts: 408
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From: Emmett, ID
Yeah the walnut will also remove surface rust and will not warp the sheet metal, if you use sand yes it will warp the metal bec. the sand is mini glass particals and is harder than the sheet metal when it's coming out of the blaster...i wouldn't use just reg. sand on the surface rust...you may be able to get away with using it on reg. peices without surface rust.....but not on the pieces with surface rust.
Senior User
Joined: Nov 2004
Posts: 195
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From: Wilton, Ca
In my trade as a industrial painter/sandblaster (retired) I like you have done lots of heavy steel.
I found that if you use 60 mash or higher and open the sand up you will lose the velocity which causes the sheet metal to heat and warp.
You use more sand ,But it is cheep in comparison to other material and will do as good of a job
Start further back and work forward till you find what works for YOU.
Don
I found that if you use 60 mash or higher and open the sand up you will lose the velocity which causes the sheet metal to heat and warp.
You use more sand ,But it is cheep in comparison to other material and will do as good of a job
Start further back and work forward till you find what works for YOU.
Don
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Junior User
Joined: Aug 2006
Posts: 98
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From: Rushville, New York
Thanks for the right local monsterbaby I should have known. RDON so just open the nozzel for a wide pattern and move in slowly to where I get the right effect. understood. I will do the frame with Glass beads for me they are readilly accessable and the I switch over to the sand for the body. Anyone, How much are the Walnut shells anyway?
Thanks AL
Thanks AL
Elder User
Joined: Dec 2003
Posts: 531
Likes: 1
From: New Mexico
Coal slag. Its sharp enough to cut but doesn't dust the way sand does so its cleaner in the air. Good respirators are always a must but I've had my fill of sand every-friggin'-place. Coal slag is sheap enough and sweeps up easily.
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