Ok, so I got this black bumper paint from Pep Boys today, it's made by Plastic-Kote. It's acrylic, if that matters. I plan on testing the paint on the trim of my rocker panels before I do any bumper work, but I have a feeling that the color that I'm going to get is a flat black (just says "black" on the can). My question is, what would I need to add after I paint to give the trim a more "glossy" look?