twizted is right.what id do is wipe it down w/ a rag wet not soaked w/ lacquer thinner.dont get it too wet,you just want to clean it.do it several times.then when you get ready to spray,do it again and follow right up w/ the dye.ALWAYS check in a hidden area to make sure it wont melt it.also check w/coverlay,they make "caps" to go over your dash.they might even come in color i dont remember.ive used the lac thinner thing alot,its hard to really tell you whatll be safe and whats not,as far as different materials go.vinyl like material(dashes arm rests etc)normally wont melt.ABS plastics,(like a 80s camaro dash face) will melt.in that case you can use rubbing alcohol to clean with,but check that too.and when you wipe it down expect to see some of the color come off,thats normal.get a good adhesion(sp) promoter also.ok class where do you test wipe?...........correct in a hidden area.j/k always test it tho,just to be safe.hope ive helped.
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86 blazer silverado 400 horse 350 w/vortec heads 38 x15.5 swampers (40 hawgs next)10 bolts(blah)w/4:88s coming soon,14 bolt.