I do know not to put acrylic over enamel which was why I Klear coated it to provide a barrier. I have just done a second model, this time with satin, and had exactly the same problem. As I said never had this problem before using this method, and now twice on the same day with two different cans and finishes of varnish I've had the same problem. I'm beginning to wonder if its a problem with the product. Repainting is going to be a difficult if not imposable as both models are basically finished with decals and the varnish coat was almost the last thing to be done bar fitting the odd detail. Most frustrating after weeks of work.