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77Birdman · 11-04-2019, 08:05 AM

I guess air pressure may have something to do with warping but heat created in the blasting process is what causes damage. As long as you do it gingerly you should not have a problem. If the surface is delicate you may want to use walnut shells. I typically use black diamond that i get at TSC, but it leaves a pretty rough finish.

11-04-2019, 08:05 AM	#2
77Birdman Senior Member Join Date: Nov 2018 Location: North Eastern MD Posts: 486	Re: Sandblasting sheet metal parts I guess air pressure may have something to do with warping but heat created in the blasting process is what causes damage. As long as you do it gingerly you should not have a problem. If the surface is delicate you may want to use walnut shells. I typically use black diamond that i get at TSC, but it leaves a pretty rough finish.