Ive read that water can wick in and up between these cladding joints. Ive noticed some peeling of the laminate (which is on ply) internally on the bottom corner of this rear window. Is the problem most likely where the panels join and do I need to go along and press in some silicone along these joins ? Do you think it will solve it ?  I dont see any problems higher up, so Im guessing its not the top j mould. Not even sure how to take off a j mould to be honest. Any advice appreciated. Thanks