If you find a rusty cup, I've had good results with crushed glass as the media in a cabinet with the pressure at the gun at 40# for removing and etching chrome/stainless steel for paint. Crinkle paint would hide rust pits too.
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Mitch
1970 Chevelle SS
1966 Chevelle SS
1967 Camaro ss/rs
1938 Business coupe, street rod
2000 FXSTS, original owner, 13k miles
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