First of all I do not use polyester resin at all. Hardware store polyester has all sorts of additives to preserve shelf life. There is no consistancy or repeatable quality. Polyester stinks the house out. The hardener is very dangerous and should not be allowed in a domestic house. Most polyester will not cure over epoxy glues. They might cure over 5 minute epoxy but even that is unpredictable.

Use epoxy resin only for constistant results.

Ed S