I have used Gyeon Syncro, it really works, bugs barely stick and great shine and slick. Just wipe off and use a spray detail product to wet slightly, just simple to clean. Cannot even get tape to stick on plane after, very slick. Been on two Husky's for a couple years, still good. Getting ready to do another one. Prep is the hardest part, to get all detailed and clean prior to applying the at least 3 coat process. Takes 100ML bottle to do cub type plane, and I do not do underside of wings other than where wheels can throw up stuff.
John