The concept sounds, well err, sound. I use 2001 UV proctectant on my pool liner above the water line annually and get twice the use from it. The guy I buy my liners from said not to tell anyone or he would be out of business
. I also use it on my hot tub cover and have extended it's life as well. My panels (4 years old ) show aging and will need replaced, but it definitely will be kept in mind for replacements. I plan to go to a GH supply in Lancaster to buy my replacements and want to use a triple wall polycarbonate at the very least.