about engine paint. Maybe I'm too demanding, but I painted a nut just to make a test with VHT engine enamel universal aluminum. It scratches easily with a screwdriver, especially on not rough surfaces. Is something that happens to everybody or is just that I didn't prepare the piece in a good way? It was sanded, cleaned in solvent and baked after painted. It matches the original grey color, but I hoped it would be more resistant to scratches. Does it exist a more resistant paint?