Hello, I didn’t know in which category I should open the topic. It’s about a roof box that I want to paint. It has a golden color. We don’t like it. I did an experiment, but that went into my pants. I had a primer and a paint spray. See appendix. The paint went off very easily. e.g. with my fingernail. Photo also in the attachment. With my garage neighbor we found that it was grinding. By hand was not enough. He was sanded and primed for testing with his device. Here the paint didn’t go off. Errors occurred when grinding. I ran off the black color with the grinding machine and wanted to start again. Have also read. That the color is only up to 50 degrees suitable. That is achieved quickly in the sun. I needed a professional advice. With what should I prime and paint? However, should not cost much. The color can be grey or black. High gloss or matt. The whole should be heat resistant and the color should not go off easily.