Thanks Dave, I use West Systems a lot. I think I will coat the boards and put some UV satin varnish on them. That way the entire thing should be pretty waterproof. I would have rather used teak oil like on the rest of the trim, but I want the boards to last. I like the way teak oil looks more. It will be more work up front, but then I can forget about it. I'm also going to make a separate lower board for my compass when I'm sailing. Thanks for your input. Paul On Thu, Jan 28, 2021 at 8:20 AM Dave Scobie <scoobscobie@gmail.com> wrote:
Paul:
The issue is the glue may react poorly to any water if it isn't exterior rated. The inner layers of the plywood may have voids ... as the hatch boards are not structural nor being bent small voids isn't much of an issue.
If you wish to give it a try epoxy the edges. If any voids along the edges fill the gaps with thickened epoxy. The edge are where water will easily enter the layers and delam the plywood and rot the wood. The outer surfaces finish how you like. If you accidentally put a gash in the teak veneer epoxy the spot soonest as water will get into the layers (with problems as noted above for the edges).
IMO that plywood will have a limited lifespan depending upon how much water (or even high humidity) gets into the layers.
:: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - m15namedscred.wordpress.com <<-- new site!
On Thu, Jan 28, 2021, 7:22 AM Paul Baker <avalonjazz@gmail.com> wrote:
I have located a 4 X 8 Sheet of Teak Plywood, but it is not marine grade. If I use teak oil, I'm wondering if it will be okay. Does anyone have an opinion on this? Thanks, Paul
On Wed, Jan 27, 2021 at 7:41 PM John Schinnerer via montgomery_boats < montgomery_boats@mailman.xmission.com> wrote:
Yeah 12mm of whatever kind of wood is a wee bit less than 1/2" - .47" in decimal. It fits easily but not too sloppy in my M17 slots even after glassing one side.
cheers, John
On 1/27/21 4:32 PM, jerry montgomery wrote:
Original boards were a bit larger than 3/8"; some 1/2 will fit but barely. With 1/2, you might need to put a slight bevel on the outside top so the slider will drop over it.
jerry
-- There are only 3 types of people in the world. Ones that can count and ones that can't.