Jake B-
I solved the teak handrails problem back in about year 2000 when living down in the Bay Area.
Take the rails off and sand them down to new wood completely.
Use a first class clear gloss polyurethane coating with a UV inhibitor, such as Varathane, Minwax, or similar. It will have a yellow/amber color en masse in the can. Brush it on with a first class brush. Dilute the first coat 10-15% to assure deep penetration. Clean the brush religiously.
Let the coating dry reasonably hard, then sand lightly for tooth. Use a tack cloth after sanding. Re-coat. Ditto. Ditto. >>>>>>>>>>>!
Keep going until you have 7-10 coats. It starts to look like glass or resin encased wood. I did 9 coats on mine.
This all works out best when you're not using the boat, like winter, and in a warm garage or workshop.
Patience and time are the keys.
Re-mount the handrails on the boat. (Be sure and do the little ones on the back of the cabin at the same time.)
Use the boat as much as you like, but don't let it just set out in the sun for days on end exposed to the sun.
Mine is starting to look like the coating is shrinking down enough to slightly show the grain texture underneath, though it is still glossy 12 years later.
To be fair, I do keep the boat in a covered berth at the lake and in a RV Barn at home to limit UV exposure.
I will put some more coats on a few years down the road.
Works for me!
P.S.: Keep those wooden rails!
They're prettier than stainless, they're warm instead of cold to the touch, they look more nautical and classy, and their larger diameter fits your hand better and gives you a better, safer grip! :star :star :star :star :star
Joe. :teeth :thup :