I have some aluminum willpak rear window louvers on my 2006 mustang and I’m wanting the repaint them. They are probably around 5 years old. I know I need to sand it down and I heard I should also use self etching primer. After that I am lost. I’m wanting them either matte black or semi-gloss, really don’t care but I don’t know what paint I should use. If anyone could help me I would greatly appreciate it.