by onesixtyfour » Tue Oct 08, 2019 4:52 am
Most resin casters these days use silicone rubber molds to cast parts, myself included.This causes a thin film to remain on the casting afterwards. I recommend soaking the resin parts in a good quality liquid dish soap mixed in warm water for 30 minutes. Then wash the parts under warm running water cleaning them with more liquid dish soap using a small toothbrush. Place the washed parts on a dish towel and let them air dry.
If you still have problems, try washing the resin parts with acetone using a small toothbrush, then wash the parts with liquid dish soap and let them air dry.
Your problem could be that the cleaner you're using on the resin is leaving a thin film of the chemical on the resin, and is reacting with the paint. Even when cleaning with acetone, the parts still have to be washed completely as described above.