Depends how deep the scratches are, but a heavier cuttin polish may do the trick. You'll be hard pushed doing it by hand though.
As for the bits of paint, get some AugoGlym tar and bug remover and dab it on the paint areas, let it soak, and then try washing off. Failing that, if they're small enough, try a clay bar.
Or, if you're really careful, and depending on what paint it is, white spirit could do the job. 91
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