powder coat repair question

[nmikes]

Have a Gobi roof rack, and I was at the dealer today and happen to be walking on my roof and noted a small patch of powder coat had flaked off and the bare metal was rusting. Now what is the best way to repair it? or do I even need to worry about it? Would the best bet be to get some sand paper and a can of paint, or is there more to it than that? I really don't want to make it worse.