You need to degloss it, or etch it, if you want any kind of paint to adhere:

https://www.amazon.com/SEM-39683-Grey-Etching-Primer/dp/B000GTIRAU

Sand blast it, or sand the hell out of it to take the gloss off. If it stays shiny, the paint will not be able to grip on to it.

u/itsnotaporpose · 2 points r/casemods

Self etching primer is a good way to go if you’re working with a metal surface. Also, use a light colored primer if you’re trying to transition from black to white. Using a darker gray or black primer will only cause you to apply more coats of white paint.

dietec on YouTube does some pretty intricate case mods and paints almost all of them. You’ll see he does a lot of prep for paint which is very important as well.

Here’s a link for some primer. (Use a mask or work in a well ventilated area, this stuff is toxic as hell)

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