So our sort of new coach has the 3-M protective plastic on the front cap and it looks like heck.
Having had some success with cleaning up plastic headlights, I tried some of the same tricks on the softer 3-M but to no avail. I was able to reduce the scratches some but the cloudy / dingy look came right back. A recent article in the FMCA magazine addressed this and 3-M consulted with the result being the film should be removed. This is tedius and expensive to replace.
Good news!
A supplier was checking my windshield gasket and we talked about the 3-M. He tried a product he happened to have on his truck. After about two minutes of rubbing and buffing the scratches were almost gone as was the milky discoloration. I have kept an eye on the spot he did for about two weeks of sun and rain and the discoloration has not returned. This is the best looking spot on the whole front cap.
The product is Novus #2 Plastic Polish. There is also a #1 (very fine) and a #3 (coarse). I am told that this is only available at a Novus dealer but can be purchased in a quantity large enough to be worth while.
Since we are some distance from a Novus, it will take some time for more information. If anyone tries this, could you post here yor impression of this product? Looks to me like one could expect a result of 80 % of new.
Best of luck
Keith