What's the best way to accurately paint molded-in hard lines on chassis?

[Monty]

I've got some kits with fairly decent renditons of factory brake & fuel lines molded to the chassis. I'm not talented enough to replace them with actual metal lines, so I'd like to enhance them as much as possible with model paints.

Any special techniques (masking etc) you guys use to paint a brake or fuel line completely without getting any on the chassis? Any particular paint(s) you like best for this kind of detailing?

I've done them for years with silver enamel and a 10/0 brush and toothpicks, but results varied with the crispness of the mold.

Bonus question: Has anyone tried using aluminum BMF (less shiny) on molded-in 1/25 scale fuel or brake lines? Results?

Edited March 28, 2012 by Monty

[SuperStockAndy]

I myself am partial to Silver Sharpie markers.