I recently removed the old decals from my Nacra 5.2. After using a razor scraper to remove the decal, I was left with the old glue underneath. After several attempts with various glue removers I had no luck. 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, I washed the boat with soap and water. 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. I wonder if it works on tatoo's? hum....