Does anyone have any expereince of colouring Cataloy, Brummer, or such like to give a bright colour? I am going to rout writing on a board and fill the letters with a red or blue or yellow stopper. I wondered if anyone had done this using artists acrylic paint or similar which being water based would mix with brummer but dont know what to use with say white cataloy filler which is spirit based. I thought if I protected around the letter edges with shellac, then filled, I would not stain surrounding wood and could then sand down level. It is to make-up clocks with 'our time' and 'family (abroad) time' with a 6 hour diiference......as seen in all the best films. Any help appreciated.