Re: When should we wax the penthouse roof?
We had the textured finished (similar to Line X) on our PH top and I liked it a lot.....no waxing needed. As far as fiber glass tops. We have a AT FlipPac (similar surface on the smooth PH top) on our Tacoma and I waxed it religiously once every 3 months. After 5 years of ownership , there are signs of oxidation on top. I would suggest to apply some type of sun protection wax of some sort once in a while. Good Luck.
"I do, cellularSTEVE" :o)