Goof Off or Goo Gone...I used Goof Off and it didn't harm either the '93 or '98 paint or gelcoat.
While at the store, don't forget to get a can of elbow grease too...
You've got to wet it good, let it sit a bit to soften, run your fingernails through the glue (or a soft plastic putty blade) to get off the easy stuff, and repeat...don't just try to use a paper towel only to wipe it off, you'll be there for days.