I have a BAV 2003 clipper 41 with teak decks.
After recaulking and replacing some of the strips and trying several preparations to rejuvenate I tried my own solution.
Having looked at the chemistry of the better preparations, I came to the conclusion that the issue of the poor appearance was optical rather than some wear or weathering issue.
The better preparations left the teak appear "wet"
I made a preparation of silicone oil in white odorless spirit and after some experiment settled on a solution of 20% silicone oil in white spirit. I chose silicone oil because of its very high boiling point - low volitility and applied it liberally on the teak. NOTE -YOU HAVE TO CLEAN THE TEAK FIRST! Otherwise the black discoloration in he depth of the grain will remain. I learnt the hard way.
The photo attached is the anchor well cover after 3 months in the weather.
Note the teak also has a hydrophobic character preventing water ingress.
Thanks for sharing!
Could you please take another picture after one year and share with us?