Quote:
Originally Posted by Doug in NJ
I did a fair amount of outdoor blasting on my car (frame, top and bottom floorpans, etc.) with a typical generic Chinese pressure pot and a 17 CFM compressor, and I never saw any sign of distortion.
If you are concerned, try an experiment before working on your car: Get a nice flat thin piece of sheet metal, and blast away, with the highest pressure you can generate. See how what sort of damage you are capable of doing.
Doug
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When I first built my sandblast cabinet I did an experiment using a putty knife. I blasted it with the nozzle an inch or two away and using about 90 lbs. pressure. The blade curled right over. I then blasted the other side to make it straighten back out.
I have blasted Model A front fenders outside using about 40 lbs. pressure, black beauty media, and holding the 3/16" nozzle about 6 inches away and had no problems. It was slow, but got the job done.