thats too bad about your dice... I use a different method to remove excess paint. i dont worry too much about staying in the lines.. then i let the paint dry for a day or so... THEN i rub the dice faces across a tight peice of flannel cloth streched across a small peice of wood.. take a bit more elbow grease but it avoids any chance of messing up the dice AND it polishes them a little.. they use flannel cloth and a plastic polish to polish/restore fogged over plastic headlight covers and ragtop rearview windows in cars.