I am wondering if it makes a difference the wood being teak. Curious if anyone has experience with it on teak? I am thinking to thin the first coat 50-50 second 75-25 and last full strength. I am also a bit concerned about hardness of surface. The only thing they do not recommend is floors which tells me it may be a little soft. My guess is it will not hold up well to any chafe but then again no finish does. I suppose I will start with a test section maybe a handrail.
Thanks for the info on Bluenose. Unless the Teak is fresh, I wouldn't worry about the oils making it difficult for the varnish to adhere. I've never had a problem, but wiping with acetone first is standard.
The PS article is well done. It shows there is no maintenance free coating, just degrees of maintenance. I've used Urethane based spar varnishes and like them. The only reason I don't use them on my boat's exterior is, they may be more difficult to remove. Regular Spar Varnish is an 'easy' coating to remove.
Maintaining brightwork is a series, the end being removal of the failed finish. I assume the crew of Bluenose is finding the urethane Helmsmen removal not to be a big issue(interesting to me).
I'm experimenting with some lower cost spar varnish options on my boat which has a lot of 50+ year old mahogany and teak parts.
I'm finding application-sufficient initial coats(8 to 10), an annual spring maintenance coat, are the most important parts of my system. Spar varnish brand is secondary, for me. Pro's may choose a higher cost spar varnish based on experience with application, and rightly so.
As far as the hardness of the urethane Helmsmen, I'd guess it's harder(a bit) than standard resin based spar varnish. Spar varnish is a soft coating which is a quality that keeps it in use. It stretches a bit making it a very good wood sealer.
I use gloss spar varnish above and below, including the wood sole. It's hard enough for the sole, but the gloss turns to mat in a few seasons. Still, it's doing the job now-protective coating, 14 years after I coated it in several coats of spar varnish.
Do you have any larger photos of your boat? Beautiful in the small photo.