I'm certainly no expert, but...
I have enjoyed beautiful success with a McClusky product available from Ace
Hardware called GymSeal. It's a
single part flexible coating commonly used on basketball courts and gymnasiums and has remained in fine condition on our
teak & holy sole for the past three years under severe conditions. It comes in gloss or satin finish. $17 USD / quart.
And I reckon a
school gymnasium suffers far more abuse than any
boat ever will - provided a competent
skipper keeps her off the rocks.
Kirk