[Paddlewise] Rhino Guard on Hulls?

I've got an old Easyrider fiberglass river kayak (Augsburg II; 1972) that I
picked up for a song and has gotten a lot of use on the rocky riverbeds here
in PA.  The gel coat has been gouged out in several places on the hull and,
trying to think of a semi-permanent solution, it occurred to me that  "Rhino
coating" - you know, the spray on bed liner stuff for pickups - might be the
answer.  I called a shop that does this sort of thing and they said that,
yes, they could do it and have done it on aluminum bass boats on occasion.
The abrasion resistance and tenacity of polyurethane is super but it would
likely add several pounds to the boat and would cost approximately $5/sq.
ft.  I'd like to get some feedback from anyone who has tried or looked into
this as it's likely an irreversible process and I really like the way this
boat handles.

Jeff

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