I painted my Golden orb grey, and found out it didn't dissipate heat well and ran hotter, so I sanded the outside, and now I call it the ugly orb.
I painted the fans aluminum, and painted the tips of the blades metallic to give the air plane ring effect (Kick arse)
I painted the wires, and am now working on air brushing some symbols on the inside of my case.
My computer fans RPM slowed by 0.003 percent after the paint job.. WELL worth it..