I believe there's a product line
with the generic name "c plex" Haven't applied it for some time but it consisted of a "mat" of fiberglass with "strands" of interwoven epoxy
(material) type cording every c. 3 ". It came in 4' to ' sheets that could be cut and applied (by screws & epoxy
to the 1st sheets, initially) and then gel coated over and process repeated. If available it should extend the "useful life" of your deck radically. Hope this helps.