A paint brush dipped in Solveset, slather on the offending number for a minute, then rub with a white eraser.
Might take a few applications/performances, but never had it fail, or remove the paint under a Atlas.
Also, use a round toothpick soaked in Solveset to get the nooks and crannies.
Some times the whole number with a toothpick, plus, it can be carved to get into tighter spots.
Leaves a nice, semigloss burnish on the paint.