Something like this (only stained)?

This is finished with a waterlox brand tung oil which is waterproof for years. then you just apply 1 more coat to keep it that way every few years.

I put a link to the way they recommend doing a waterproof finish. Don't know about it being outside. But this will take care of the water issue!

craft art wood countertop finishing instructions - for waterproofing

Here is a link that might be useful: the 2 products they recommend are here (need both the waterlox brand ones)

Woah. Sorry, I don't know how to make that photo any smaller. I was proud I was able to include the links and make the photo work at all so I will stick with being proud! : )

Thanks, yes, just like that, but darker. Thank you for the helpful link. I will talk to my carpenter and see how we can do this. :)