Touch up help

I recently had a K-line k-4 be nicked in a few places on the boiler. Can anyone tell me what kind of paint I should use or how to touch up a loco.

Alex

A jar of BRUNSWICK GREEN, and the smallest artist brush you can buy. Just touch the spot lightly and back away and let dry. You may need to repeat this process several times to fill in the paint chip, while trying to avoid build-up.