If you purchase a set of Tour Vision sunglasses that has a logo emblazened arcross the lense, here is a removal tip: Take a q-tip and some Goof Off and sparingly rub across the logo for a few seconds. Immediately after, using a second q-tip rub the area with rubbing alcohol to stop the chemical reaction. This worked great and the sunglasses are now usable. TIP - you may have to do the above process a few times in order to totally remove the logo.