I've inherited some gorgeous blown glass painted Christmas ornaments from an elderly relative. They're probably at least 75 years old. The problem.....when she used them on her tree, she sprayed the whole thing with that fake artificial snow spray and they're coated with the stuff! Does anyone know what solvent will remove that fake snow stuff without using water? I tried washing a small spot on the backside of one of them and the paint came off too. Windex? Rubbing alcohol?