I just used Burgess Hydrosol marine sealer for some interior work on my clinker dinghy as it got an excellent result in the Classic Boats test. It's a slightly coloured satin finish which helped my pine thwarts blend in nicely with the oak and mahogany. It's also microporous which I find I need as some stupid sod has sealed imperviously the outside of the hull in the past. In addition it's amazingly easy to apply and can be overcoated within the hour.
I also used some Epifanes Clear Coat over some of that treated wood to give a nice semi-gloss finish and still retains microporosity. It still retains grip when wet. I've done the thwarts and gunwhale. I just need to do the inner planks now to complete the job.
-------------------- If I can misunderstand, I will misunderstand.