Two products for decorative painters are beeswax products which can be seen/purchased at http://www.chaphams.com/
One product is a furniture polish and the other is a wooden salad bowl finish.
I love to use wax on my wooden pieces that I stain first and then paint my design "ontop" of . I apply several coats and buff good between each. Really makes an heirloom type piece to be proud of.