Teak deck Q
I worked as a marine engineer on a number of boats that had teak decks. We always just washed them down along with the rest of the boat, and periodically lightly sanded them to keep them flat.
The best idea I ever heard of, concerning installation of teak decks, is to use something like West system epoxy to bond the wood to the boat, with a lot of weight on top to hold it down, rather than use fasteners. West system is expensive, but it eliminates screws, plugs and the eventual leaks.
When the teak plugs start ‘popping’, it’s a real pain to fix. You have to pull the screw, countersink the hole a bit more, put the screw back and glue in a new plug.
Ekhar, the decks look that way in the photos to sell the boat. The current owner of the boat and the broker selling it care nothing about the maintenance of the teak deck, they both just want to see it sold. To make it look good they put some kind of teak oil on it.