I have a bunch of letters I cut from 3/16" gatorboard that need to be painted a dark green. I purchased a can of matte green paint from local hardware store and painted a few to see how they would look. The finish is OK, but the foam has started to 'shrink' around the edges where the paint has come in contact.
My question is: Is there a specific paint for foam boards like gatorboard? Apparently, the solvents used in ordinary spray cans attack the foam and causing it to 'vaporize'.
Any info on painting foam would be helpful.