Sorry for bumping this old thread, but I have a solid resin prop with a clunky paint job (uh, that I did a while ago.. lame) and I noticed the 3 methods above:
Pine Sol
Oven Cleaner
Acitone
Which of these requires the least "elbow grease" to get the paint off? I ask because i have a newborn and its hard to find time to scrub things with a toothbrush for hours..