Fix for front cap delamination
I too had a problem with my front cap and I thought it might be from moisture getting by the seal. However when the cap was removed, we could see that the material delaminated because the glue did not stay adhered to the backing and there was no sign of moisture. Certainly a manufacturing/design defect but given that it was on a 2006 trailer, we figured there was no warranty coverage (even thought the trailer has seen very little use).
We chose to replace the cap with painted sheet-metal that interlocked at 1 seam and the lower part of the front cap used diamond plate (to minimize rock dings). Hemet Valley RV in California did the work and did a great job. They also ship the panels throughout the nation. You can see a video of their process on their website.