Hi Mark, I take for such things the same spray as for cleaning up the oven (in German: Backofenreiniger) Figures into a plasticbag and some oven spray, close the bag and wait some hours, then take a old toothbrush (or even one from your wife 😉 😆 (joke)) and some water and the figures will be mostly clean of paint. It works very well and I tried it several times. cheers from Germany!