Well I've found a way to get "free lunch" I spent the morning in a local restaurant kitchen. A small place but they are passionate about their food.
I did a little show and tell of some of the knives I have made then showed the owner the basics of how to sharpen a kitchen knife with water stones. It gave me a chance to see what they are using for what and test a new combination stone on some different steels. It was an all round fun experience and I feel like it has started a nice on going interest and connection with the owner and chef there. They were of course very happy to have sharp knives again. A very worthwhile experience all round.
The knives they had were the usual suspects, Victornox, including a couple of big old beasts, Wustoff, a Shun stainless Gyuto and some old Sabs. These as it turned out were the most satisfying to sharpen. I'm certainly glad I brought a diamond plate, their knives had had a pretty tough time.