I was planning on blasting a grille I picked up at the junkyard for my 1985 toyota pickup. My current grille is black, but the one I got is chrome, and though it's in good shape, I want to paint it black. I have a nice Marco blaster, but am worried it will tear up the plastic. I may try it on the old grille before letting it go on the one from the junkyard. I just need to get enough tooth on the chrome grille in order to spray the adhesion promoter down before painting it. Anyone have any luck with blasting plastic?