I just got done dusting all the fret work I have made over the years for the wife. I used a product with bees wax and citrus oil in it called Howard's Feed and Finish and a small brush to get into the small cutouts. It worked pretty good. My pieces look new again. By the time I got to the last piece I told her I'm not making any more fret work pieces.And yes I will keep cutting fret work projects. It's too much fun.