I covered a small disc of polymer clay with epoxy resin (easy cast) and glued it into a purse hook for a gift. When I pushed the disc into place, the glue pooled out and got on the resin. I've been trying wiping it with acetone for days and even tried sanding it off. It has reduced a bit, but it's still not what it once was. Half of it is very dull due to the glue residue. Any advice for getting it back to being pretty? What about putting another layer of resin on top, would that help?