I have read with interest a few posts you have written expounding the virtues of Cetol, including photographic evidence. To the point that I am sold on it for the more difficult exterior teak. I spoke today with a couple of guys who know a thing or two about Cetol. In the photo attached to your post in this thread, is that finished only with a single variety of Cetol, or was it over-coated with the Cetol gloss? It looks great, and I would be happy to have that finish on my exterior teak, without the higher demands of varnish.
Also, there has been much discussion of "color" or tint of various Cetol flavors, so I gotta ask. You say you used "Cetol Marine", which is one of the four varieties, but it could also be shorthand for each of the other three:
Cetol Marine Light
Cetol Marine Natural Teak
Cetol Marine Gloss
Based on my research, I will likely use Cetol Marine Natural Teak (only), with no overcoat of Cetol Marine Gloss, but I am interested to know what you have used for your fine result.