Klas44,
Sounds nuts but I have a beautiful picture of a big blue boat that is steel but sheathed in FG. Don't know if it was using polyester or something else but it sure looks good and the owner says no problems.
I for one wouldn't think that the plastic would adhere. Related to that is that it would be unlikely that expansion would be the same for both materials. Think cold hull at night and then bright sun on the hull in the am would bring heavy sheer loads between the two materials.
But it worked for this guy.
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Eric
North Western Washington State USA
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