Sunlight is the enemy. The reason clear vinyl turns opaque, then yellow, and ultimately brittle is the loss of plasticizers, most often due to evaporation caused by sun exposure.
Two brands of clear vinyl, Strataglass and O'Sea, incorporate hard surface coatings for scratch resistance, which have the added advantage of sealing in the vinyl's plasticizers. All other clear vinyl’s, whether from a roll or a pressed and polished sheet, lack this barrier. The barrier that seals in the plasticizers in clear vinyl is a polymer coating, a liquid that you apply to both surfaces of the vinyl. Give this substance sunscreen characteristics and it becomes a two-for-one deal. It's best to start when the windows are new.
Damage occurs first on the surface of the vinyl, so if it is not too deep, we may be able to remove the damaged layer with an abrasive. We Start with a plastic polish and see if we can buff a small corner to clarity. If the answer is yes, we can restore the whole panel the same way.
Vinyl beyond the repair capacity of polish can be compounded — just like dull paint.
ISINGLASS CLEANING - BOAT DETAILING CAPE CORAL offers CLEANING OF VINYL ISINGLASS BOAT WINDOWS in CAPE CORAL, FORT MYERS, ESTERO, BONITA SPRINGS, CAPTIVA, SANIBEL, PINE ISLAND, SOUTH FLORIDA