Neobond

plastidip is a matte rubbery coating. If it turns out bad, you can just peel it off... Pretty forgiving stuff, and lets you remove the paint if you outgrow it/ want another color.
 
I had some blaze green on my ram, and it was fine. Doubt any part of your pc (except maybe the heatsinks, but you should not be painting those anyways) gets too warm for plastidip