I'm currently in the process of refinishing the teak on my Californian and it has miles of it. I'm about 75% complete by knocking out a section at a time.
The process I'm using is:
1) Strip the old finish to bare wood using a heat gun and scraper.
2) Sand with 80 grit.
3) Clean with Oxalic Acid, 1/2 cup per Gallon of water. Apply with stiff bristle brush and let sit 15 minutes then scrub and rinse off with water. Re-apply as needed.
4) Let it dry out.
5) Knock down any rough spots with 120 grit.
6) Dust it off, Tape it off.
7) Refinish:
a) Three coats Cetol Marine Light applied at 24 hour intervals.
b) One Coat Cetol Marine Gloss.
Caution: The heat gun stripping method works great but you need to be careful not to burn the wood. Keep the heat moving in front of the scraper.
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