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<blockquote data-quote="Ray Clark" data-source="post: 509470" data-attributes="member: 31103">3/4 inch plywood is actually 23/32, so it&#039;s not surprising that you see that marking on the plywood.&nbsp; I bought two sheets of &quot;3/4&quot; Maple Plywood last week at Menard&#039;s; it will be used in a furniture project.&nbsp; The labeling was nominal for 3/4&quot; ply, but the &quot;fine print&quot; on the shelf label stated that it was actually 0.704&quot; thick.&nbsp; I actually measured both sheets with digital calipers; one measured at 0.703&quot;, the other at 0.733&quot;&nbsp; Is your boat stored inside?&nbsp; If it was me, and if my boat was normally stored inside, I would opt for exterior-rated 3/4 ply.&nbsp; Any voids on the surface can be filled with Bondo.&nbsp; Further, I would coat the ply (both faces and all edges) with fiberglass resin; that will provide the sealing that LDUBS suggested.&nbsp; Fiberglass resin is available at most home centers.</blockquote>

[QUOTE="Ray Clark, post: 509470, member: 31103"] 3/4 inch plywood is actually 23/32, so it's not surprising that you see that marking on the plywood. I bought two sheets of "3/4" Maple Plywood last week at Menard's; it will be used in a furniture project. The labeling was nominal for 3/4" ply, but the "fine print" on the shelf label stated that it was actually 0.704" thick. I actually measured both sheets with digital calipers; one measured at 0.703", the other at 0.733" Is your boat stored inside? If it was me, and if my boat was normally stored inside, I would opt for exterior-rated 3/4 ply. Any voids on the surface can be filled with Bondo. Further, I would coat the ply (both faces and all edges) with fiberglass resin; that will provide the sealing that LDUBS suggested. Fiberglass resin is available at most home centers. [/QUOTE]

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