[mrchip]

Good thought provoking post Brent...if original h/l were coated with a uv blocker film to prevent them from turning yellow why wouldn't you need them after you cleaned them? ..their original film will last up to five yrs before the elements and harsh uv destroys them..hence our industry..so to clean them and not seal them would be a very temporary endeavor..my guess and what I have been told was under a yr before they would yellow..especially in the south where the uv is really strong..when i lived in N.j. I rarely saw discolored h/l.. when I moved south its all over the place..I have a h/l I cleaned with ips over a yr ago and is still great..now some guys use auto clear in a spray can and some apply with foam brush...it lokks great but auto clearwas not meant for plastic lens and after time it will start to peel..nano out of virginia has a spray that will last up 5 yrs..lots to ponder before you endorse a product...I want to use the best and give the best value I can to my customer for retail..if you charge retail customer 90 to 125 for h/l wouldn't you want it to last a long time..if you paid me that price and 6 months later they were turing yellow would you think you got a good deal?