Judiciously applied, some thinner ought to make short work of the overspray. You'll want to be careful on ANY painted surfaces, but chrome is not going to be damaged. Make absolutely sure the thinner doesn't come into contact with the fresh paint, though, because it still hasn't cured.

If you're going to try to fix the sags (runs), wait a while before doing anything. The paint may not be dry yet, and if you try to scrape (a razor blade is the tool for the job) or sand the run, the paint will tear.

Best of luck!!

Jay.

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On the road, currently:
'83 300D (German spec.) 168k mi. - - Wolfgang (tucked snugly away for the winter!)
'87 300D 375k mi. - finally went over to "The Dark Side"
'87 300TD 225k mi.
Cannondale 66cm CAAD5 w/Campy/Jamis Aurora
Hujsak Custom Fixie/Landshark Track Shark Custom/Ahearne Custom 29'er