sandblasting is fine . i would try and use a fine course sand, so its not that rough. as far as painting it with pj1 paint u might want to use a primer under it first and it should be fine just give it sometime to cure out before you go messing with it. dont forget to use some type of cleaner or tac rag before painting. u can pick them up at a napa or parts house . well good luck post pics when done