Sorry for the late answer, definitly too busy these days...should I say last months ?

Personaly I use an old toothbrush, that I dip in acetone and then, rub the figure with it.
Using the toothbrush can be messy : rubbing the figure with it "spray" bits of paint and acetone (wich is a dangerous chemical) everywhere...ESPECIALLY IN EYES. So be very carefull if you want to make a try.
Always wear good protection glasses , as usual when you use chemical products or dremel-style tools.