You're right. Though it won't hurt, prepping teak for varnish is a waste of time for the reason that you point out - varnish's oil content.I thought with an oil base varnish, the oil from the varnish will bond with the teak oil. When I installed my Teak Deck on my swim platform, I laminated it [3/16"] with epoxy, and had to wipe down the teak with Lacquer Thinner and then scrubed with a stainless wire brush followed with more thinner, It's been 4 years an no problems. I just thought with the varnish you might not have to go thru all that. Anyway, thanks for the info...Joe D
You're right. Though it won't hurt, prepping teak for varnish is a waste of time for the reason that you point out - varnish's oil content.
You're also right regards prepping teak to be laminated. Once prepped, my preference is for a two-part polyurethane (I used to buy this from Aircraft Spruce & Specialty decades ago) for mating surfaces run through a jointer. For sloppier joints, I'd use epoxy.
Regards brands of varnish, any by Interlux.
Water doesn't get under the epoxy because it has saturated into the fibers of the wood and then cures. That is the reason for hot coating the epoxy until it stops absorbing into the wood. Penetrating epoxy is much thinner than you may expect. This system is used on many of the big Florida sport fish boats that have teak toe rails for miles around the bow.what happens when water gets under epoxy does it come off in sheets