Removing dried excess "Great Stuff" foam from f/g surface -?

I used some "Great Stuff" expanding foam to fill up a small void I had in a damaged boat hull. I got some drips here & there on the surrounding fibergl surface - is there any way to remove the dried foam from the f/g ? I know over time when exposed to sun, rain, elements, the 'great stuff' will gradually break down & hopefully come off, but in the meantime is there any product, cleaner, chemical that would remove the drops & smudges (probably not without damaging the fibergl too ??)