I then tried OFF mosquito spray. It worked great!!! I just sprayed it on and immediately scraped the glue off with a razor scraper and wiped off with a paper towel. After the decals was removed, OFF mosquito spray also removes permanant ink marker(can you say Sharpie?).They don't call this stuff OFF for nothing! And just think, we spray this stuff on our bare skin.
If you are using a version of OFF that removes glue be real careful around things like sunglasses and watches.
In general the active ingredient in OFF, DET, is a powerful solvent that will dissolve, among other things, polyester (gelcoat, sails, your Speedo, etc). Generally there is not enough of it to do any real damage but when you use high concentrations and add things to slow the evaporation you can start doing some damage.
I don't have enough proof to start a lawsuit but I destroyed a pair of sunglasses and 2 watches started leaking after I switched to Sports OFF. No problems since I switched back to SkinTastic.