Great advice Ace. I'll try this next time.
"EDIT: I also recommend scuffing bare plastic with hot water, Comet, and a toothbrush prior to primer. Works much better than sanding, doesn't obliterate fine detail like scripts, and gets into all the little nooks and crevices.
Rinse very well, dry, then wipe with 70% isopropyl alcohol on a clean white paper towel."