Wet sanding does a great job, but it's very labor intensive too. If you find yourself doing quite a few, you may want to invest in a bench polisher. If you click on my profile photo, you'll find a Model 560 (from 1960). I painted all the trim on it. The SEM plastic/vinyl paint is very durable. It's often used to spray out plastic trim on cars, so it works well. Please post photos! I love work in progress photos!