I ran across the use of the paint
additive Penetrol (Flood Co.) used to restore oxidized the fiberglass gel coat and decided to give it a try on my boat since it's never been waxed in the last 18 or so years. I did this rather than using our Scamp
for a test subject since the gellcoat on the Scamp
isn't too bad and waxing was fine for everything but the rood... I'm going to try the Penetrol on it. If the stuff works on my little boat it should work on the fiberglass campers. Penetrol is available from places like True Value hardware and Home Depot for about $10/quart.
I cleaned the boat thoroughly with a combination of bleach and detergent (we live in coastal SE North Carolina and everything molds here). Applied a coating of Penetrol and allowed it to dry (absorb into the fiberglass?) for 5 min. Wiped off the excess with an old bath towel... this part is work since the excess is like wiping off partially dry varnish. I allowed the treated surface to dry/cure for 24 hours and applied a coat of wax. The results were quite good and the surface of the boat looks almost as good as new.
Application helpful tips:
>>>try the application on a less obvious place on the trailer (like the roof) to see how it works and what the application is actually like.
>>>use staining pads (terrycloth covered sponge pads) for application.
>>>pour the Penetrol into a coffee can (I didn't and it's tough to pour from a quart container without making a mess.
>>>apply a fairly heavy/even coat over small (maybe 3' X 3') sections at a time since the "wipe off" step is work.
>>>apply a coat of wax after about 24 hours or so.