Re:Painting Intercooler Q's?
 

If you're really worried about losing efficiency (even though, as said, it probably wouldn't be enought to worry about) why not try some radiator paint?

http://cache.eastwoodco.com/images/P746.jpg

That way, not only would your heat transfer be unaffected, but the color would be dead on for that radiator look.
http://www.eastwoodco.com/itemdy00.a...1.x=56&I1.y=50

Re:Painting Intercooler Q's?
 

Lots of factory intercoolers are painted so it cant hurt that much.