Has anyone glassed the front / rear end cap seams??

I am not very mechanically inclined so I am not sure we will be speaking of the same thing. We came to Tiffin's in Red Bay to have some service done. Up until a few years ago the rail caps were made of fiberglass. It was discovered that the fiberglass developed tiny cracks that turned into cracks that leaked. Tiffin is now using aluminum and is replacing the fiberglass rails at no cost to the customer.