I have a door from my kitchen to the deck. It had been an ordinary wood
with a clear finish. It opened outwards. When it rained I would leave the
door open. For years the finish was fine. Then I upgraded to a mahogany
door. Whatever finish the fellow put on blistered on the outside in a year.
And I haven't left this door open in the rain at all.

So what is the most lasting finish? Thinking like a boater I would think
that spar varnish would be good. But that was years ago. So what should I
use?

Don www.donwiss.com (e-mail link at home page bottom).