I just cleaned this boats decks with Deks Olji deck cleaner then I will oil them with D1. The cleaner works well with just a bit of effort removes the grey oxidation. More to come after the oiling process!
Just finished oiling the teak today with D1 it looks rich and beautiful!
M. Luebstorff 
That’s my boat, and Mark did a fantastic job. The teak, now 11 years old, looks like new, and will be protected from the elements. And Mark uses much safer products than the ones you buy at the store, which means a lot when treating seating areas like the cockpit.