I'd give it a good polish and perhaps dunk the headtube in oxalic acid just to get some of the worst rust off the headlugs. Might want to go over the bare metal spots afterwards with clear nail polish just to prevent it from rusting again.
Polished paint with some replacement top tube cable clamps and accessory clamps should help offset some of the worst cosmetic issues on the top tube and help it to look its best when done.
-Kurt
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