I've had good results with the Krylon "Glitter Blast" stuff and their triple thick clear. It comes out slightly textured if your going for bass boat coverage, but if you just want a little bit of sparkle it should work out just fine. If you want more of a pearl effect rather than a peppered flake look, there is a "temporary" gold glitter available, they have it at most Pep Boys/Autozone etc.. It's suspended in alcohol rather than clear, hence the "temporary". I did a helmet with it and just waited a few hours for the alcohol to evaporate, then hit it with clear. They have the same stuff in photochromatic pearl as well...