I have had problems with rustoleum paint only sanding down a partial area and repainting with the new layer of paint wanting to separate and crack similar to this:
Now Idk if that would happen with whatever paint you're using but I ended up sanding down everything a second time and re-priming then repainting my case. I don't remember if I had already used clear coat on it, but I feel the results would be the same. And if you re-sand everything now it will be less of a pain in the ass later lol.