We just finished our 13' Scamp
today using the Meguire's M4965 3 part system for Marine and fiberglass. It was a LOT of work. It took me alone about 10 hours total.
First off, I did WAY too much research on this...
Second big thing I did is purchas the Harbor Freight Dual Action polisher and and Hex Logic Pads. I tried the Harbor Freight pads, but they fell apart after a while. Of course it could have been me putting too much pressure at first. Watch some You Tube videos on how to use a DA Polisher, and how much pressure to use. I used about 5-10 lbs after I learned more about it.
Third: I removed the spare tire in the back, and also the AC cover. I did not need to remove the AC cover, its just that I wanted to clean that up too (did not use Meguires).
Third thing - using the tools and product:
The first step (Meguire #49 - Remover) took the longest - by far. I would estimate this was 1/2 my total time. The first coat is the one that removes the oxidation and scratches (to some extent). I worked around the decals by hand, as I was afraid the polisher would rip the decals off. I also worked around the windows
and bottom by hand, as I did not want to rip up my pads. I could definitely see a bit more shine after this step.
I also bought a bag of terry cloth towels at Harbor Freight, and I wiped down the camper after each step.
The second step (Meguire #45 - Polish) went faster. I used the same precautions around the windows
and decals. I saw more shine after this step when compared to the first. I think this is the step that gives the high shine.
The third step (Meguire #56 - Wax) took about as long as the second step. I saw that some people did this wax step by hand. I did use the DA Polisher with ~5 lbs of pressure, and also did more by hand on this steps than the others.
All in all, it is definitely better! I would probably do it again. It shines in the sunlight more, which is what I was after. After all that, I was thinking it would look almost brand new, but it doesn't. It feels like it is 1/2 way to what it must have looked like when it was brand new. Perhaps the sun damage was too much, or....I just don't know what I'm doing
Anyway, I am happy it is looking much better now. We are buying a canopy tent ($100) to cover the camper so we do not get any tree droppings on the nice work (we park it under a tree when not in use).
Good luck !!
Harbor Freight Polisher
Hex Logic Pads