I came via some Dutch websites across the following product:
Boipin boat oil and varnish and wondered if anyone has experience with it
Use Google translate (http://translate.google.com/#) the Dutch language (if you don't understand)
This seems to be possible with Coelan (not natural) when water is able to get underneath the coating:
Look at this image to see:
The argument of Biopin oil is: It penetrates the wood much deeper than synthetic varnish and is very flexible.
here is the website from the manufacturer:
Curious if anyone knows the product and has worked with it.
Many thanks in advance for any feedback,
(The Koster owner in Sweden)