I got some DupliColor Clear coat for the blue dome parts and I have to say that the results were very impressive. The clear coat evened out anything that looked a little mottled and did not diminish the color at all. It gave them the subtle, glossy finish that I was hoping for!
I plan on redoing the chrome on the dome with DupliColor Metallic Silver and then clear coating that, with the hopes of recruiting the same results that I had with the blue pieces.
Wish me luck!