Filon

I've been reading some other RV forums recently where there has been talk about Filon being prone to delaminating/separation from humidity and water damage (https://www.rv.net/forum/index.cfm/fuse ... t/true.cfm) and it has me confused.
Has anyone here seen the kind of issues they're describing with Filon?
What can be done to keep Filon from having the problems they're talking about with humidity/moisture?
Are there other/better options that people have found other than PMF and aluminum?
(I *LOVE* the idea of PMF but I have to make sure my project looks REALLY good to get my wife's approval so I'm leaning towards either Filon, Aluminum, or possibly PMF+Monstaliner.)
Has anyone here seen the kind of issues they're describing with Filon?
What can be done to keep Filon from having the problems they're talking about with humidity/moisture?
Are there other/better options that people have found other than PMF and aluminum?
(I *LOVE* the idea of PMF but I have to make sure my project looks REALLY good to get my wife's approval so I'm leaning towards either Filon, Aluminum, or possibly PMF+Monstaliner.)