Quote:
Originally Posted by eastonct124
If you blast sheet metal, you'll want the black media, low pressure, cover large areas, with nozzle only close enough to to make the paint or rust to appear sanded, after a pass. Then make another pass...should begin to appear transparent...with small speckles of gray metal poking through....third pass.....maybe four, and you're looking at clean steel.
Take your time....20-25lbs press.
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Not that he needs backing up just look at his restorations,But Eastonct is right low pressure & Black Beauty works well on tins you also do not want to blast straight on 90 degrees to the part.You want the media glancing off the surface at a slight angle I'll say 45 degrees to the surface but this is something you learn I have never taken time to measure the angle to be honest.Black Beauty is coal dust so it leaves oil on the new clean surface degrease well before applying primers etc.it's a myth that sand blasting will always destroy sheet metal blasting sheet metal is fine IF and that is key IF you find an experienced blaster way too many guys have gone to the local monument works or steel shop used to blasting heavy steel or stone etc. to get tin done.