The yardstick I usually use in determining what color to repaint something is this: If Im looking at it as a collectable that may some day be sold as such I match the original color(s). If on the otherhand its purely for personal use or has no collectable value then I go with the color(s) I want.
Might I suggest using a powdercoat rather than a paint. You will end up with a much better looking and performing finish that will easily out-last any paint.
Java "Loves to rebuild" phile