Originally Posted by SS930

Another thing that might help is to look into covering them with a urethane protection film... similar to the products that are use for paint protection on cars. Not only will these give great protection to the surface from abrasions, but they will also add some UV protection. If you go this route, look for the premium products that use a poly liner and have a top coating, no need to go any thicker than a 6 mil urethane. These products will give the best optical quality and the most UV protection. The compound curves of the canopies make it a little more challenging to apply to, but it can certainly be done. I've used these products on my polycarbonate windshield on my race car with excellent results. Some of the open wheel cars are now doing this as well and it's proven to be very helpful with drastically extending the life of the windshield/canopies. Note that these films will also yellow with enough time, but they are cheap and easy to replace.

Originally Posted by BLee

OLD thread, but I've been using Plexus to clean them for the last few years, & it works great. I'd like to try the Marineclean polish sometime too.