Thanks for your kind remarks. 1) No I did not redo the original black, it does have a good strong black finish IMO. 2) Not sure about metal primer on plastic parts. Personally I would use an all purpose primer that does both metal and plastic just to be 100% sure. The last thing you want is your paint to flake off. Try to get the good stuff, may set you back a few more $$'s but it will be well worth it. 3) Clear Coat? No thinks, I wouldn't use it. Today's spray paints are a lot better now that do not require clear coat IMO. I would stick with about 2-3 lite primer coats, then 1 steady primer coat to make sure you got it all, then I would repeat the same for the spray paint. Good luck, can't wait to see your finished case.