two things I've done so far:

1) Heat the bare area with a hairdryer or something to get surface moisture off and then wrap in electrical tape so it's won't be exposed while I decide whether to paint or not.

2) Not worry about it because I'm getting ready to repaint the frame.

3) Stickers might not be a bad idea either.

4) Schiek has sprayed bare spots with clear coat to protect them.