As the comment below says on the article upon which you asked for help has comments disabled, so people will have to comment on your profile, which is more effort than a lot would go to.
If it's just paint transfer try using rubbing alcohol (isopropyl alcohol). Gently rub it into the affected area to remove the paint transfer. I've done it with wipes and q-tips dipped in liquid isopropyl alcohol to the same effect. I have not noticed any damage to the figures doing so, although it may leave a sheen on the area if you use the liquid form. You can just use a damp cloth to remove it. If you are worried about potential damage you can test it on an inconspicuous spot first.