Front of camper is delaminating....best fix??

I pulled the back end of a TT all apart when I found it had been leaking. Mine was a stick and tin unit. That is the way I'd fix this, pull the old front off. get the tin sheets and make the repairs. The TT tin is corrugated making it stronger for the weight. When they first started making the smooth sided units they had many problems getting the bond to hold. If the substrate get moist it swells and breaks the bond the newer units are supposed to be using a better suited material that doesn't swell.