i haven't used this, even though i have been meaning to buy some and try it.
http://www.scraperite.com/
from what they say on their web site it looks like it would suite your application.
BTW i would be careful with the goo gone. from my understanding that and similar products are just ordorless paint thinner. i could be wrong, thats just from my experience, i'm a painter by trade, not a car painter but like in walls, ceiling doors etc.. and to me it appears to be a solvent base product. it could dull your clear coat. i would wash that area very well, and what ever you use to wash that area with throw out once your done with it.
hope i was some help
joe