the colorcoat is actually for vinyl, but works just as well on plastic...
hmmm, prep... cleanliness is of utmost importance... from years of armorall, etc,, interior pieces have an extreme tendency to fisheye..
you can go about it a couple ways... you don't really need to sand per say, but dulling down never hurts... alot of times what works well is scrubbing down the part with a scuff pad and really soapy water, rinse, let dry.. that'll dull and degrease at once.. i generally like to damp towel/ dry towel any part with denatured alcohol right prior to application.. paper towels work well..
i like to degrease twice, either the soap method, then denatured or denatured twice..
don't use thinner, acetone and such.. they'll soften or eat into vinyls and some plastics...
didn't do any door pics... they don't look that great, the plastic is hammered, and i need a new set. just did a quickie to change from tan temporarily..
this dash pad, tho cracked and needs replacing, got a quickie too, from dark brown to black...