Glue-Dots! AKA 'snot-dots':
http://www.gluedots.com/products/mini-glue-dots-roll.html
You can get them at most scrapbook stores, or craft places like Michael's or Hobby Lobby.
Pull one off the roll, stick it to a toothpick and stick your part to it for painting. It pulls off with no residue.
Gene Beaird,
Pearland, Texas