Corrugated or smooth outer finish?
I'm planning to replace my current TT. Looking at older ones, it seems that the corrugated aluminum finish holds up better to the weather. Also, it doesn't seem to get those ugly black streaks on it. ...
Forum Discussion
We have had both types and prefer the fiberglass over the corrugated. I have found that the fiberglass is easier to keep clean and while it can get the black streaks they are not as hard to clean off as they were on the corrugated material. Plus we like the looks of the fiberglass better.
