[donQ]

I've tried a few techniques and found that the best one for me is to paint the background first and let it dry for a few days. I then use thin striping tape around the raised portion of the numbers and then use blue painter's tape over the back ground and then mist on several coats using a spray can of the number color. Don't put the nimber color on too thick at once .It might bleed under the tape.
Donq