I bought a new to me TT that is in really great shape and had very few areas of de-lamination. I noticed that the dealer the folks I bought it from who they got the unit from a year ago, went over it ...
Band-Aid repairs are what you do on the side of the road. This is a Major Roof to Floor repair. The strength of the entire area has been affected. I apologize if this offends anyone, But you can not fix rotten and possibly molded wood under (any) circumstance.