Urethane clear coat over enamel. Heres a rule of thumb. When painting with enamel the surface must first be prepared to become receptive to the paint. Latex over oil but not oil over latex. The clear coat of urethane supplies the acrylic enamel paint with a buffer between the paint and the elements.
For best results enamel paint should be allowed to dry for three to seven days before applying the finish. Can you paint acrylic enamel over urethane basecoat clear coat. The surface can be etched with a mild. Polyurethane can be used over enamel paint which often provides a harder finish than latex based paints.
If you seal in with a topcoat the enamel will probably cause checking or cracking of the outer finish. Ill give you my opinion what i researched and what one paint. Can i put polyurethane over enamel paint. Weather dirt and other damaging elements never touch the actual paint on the car.
This is a common question with a lot of opinions and answers. The clear urethane protects the cars paint while giving the car a beautiful glossy coating. The enamel will take quite a while to completely dry so i would agree that you shouldnt clear it or put anything over it that might be harder. Single stage urethane is a much better paint than single stage acrylic enamel and does not need clear coat though some nason ss urethane allow clear mixed with the paint nason single stage kyle make sure your sealer is compatible with you old paint.