The Fractal Meshify C I have was the white case version, but the case expansion slot covers were originally black, so I decided to paint them to match the case so it would look nicer to me
I used rustoleum 2x ultracover - semi gloss paint, and satin clear coat spray. and some 400 grit sandpaper to remove the initial gloss and to scuff up the paint for better adhesion of the paint
I think it looks fantastic now. I'm not good with painting but I think it turned out great.