For the past 3 or 4 years I've just been epoxy sealing everything. I'm just using etex thinned with denatured alchohol. Equal amounts (hardener, resin, D.A).
Prior to 2017 I had been using the thinned spar varnish with the soft maple (with very good results) but not sure what I did wrong with it that year. Suspect it was just old or my ratio's were off. I know we've had a lot of talk about products changing to be VOC compliant so no idea what went wrong that year, so I've stayed away from it since then.
For the small amount I'm building these days the etex sealing is just a lot easier/cheaper way to go as you can get it 1/2 off at michaels with a coupon and it has a pretty long shelf life.
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