My 2006 Apex 8 has had the same problem for a few years now. In September 2012 I started a thread on this forum entitled "Outfitter exterior damage". For some reason this thread seems to have disappeared from the forum.
I have returned to Outfitter twice to have them look at the damage. They tell me that they must have received a bad batch of material. Since my camper was not under warranty there was nothing they could do. Outfitter did reluctantly offer to work on the damage, at my cost, if I could leave the camper with them for a few weeks. Since I live in Delaware this additional travel cost proved to be prohibited.
The area I live is on the east coast and close to a number of boat and RV dealers. The RV dealers were not interested in working on this problem. I did take the unit to a few boat repair business and they all agreed that the problem was not with the material but with the installation of the material to the camper. They also agreed that would not undertake trying to repair the problem.
After this summer I am going to try to sell my truck and camper with full disclosure of this problem to the buyer. My plan is to buy another camper, I don't know what make and model I will be buying, but I do know which one it will not be buying.
Mark