Love the use of the term "hand rubbed" - typical marketing speak to imply craftsmen cabinet makers lovingly rubbing in wax by hand, when in reality the panels were sprayed with a clear coating before being cut out by machine and bonded in.
Not easy to refurbish as UV will have faded the colour of the underlying veneer so when you remove the coating you will need to do some work to restore the colour and graining before refinishing. I have done this in the past with reasonable success using chemical strippers, light sanding, Colron wood dye to bring back the colour then coat with Ronseal as suggested above. This works well on solid wood trim, but unpredictable on large veneered panels.
Problem is that you need to experiment right up to the finished article to make sure it blends with the surrounding woodwork. Best done in a piece where it does not show, but that is difficult when doing highly visible panels such as the ones just inside the companionway, which is why very few people attempt it, explaining away the drab finish as "patina" - a term as highly respected in the antique world a "hand rubbed"!
A much more sensible solution if the panels are really bad is to reveneer them which is not as difficult as it sounds and you stand a good chance of getting a match when choosing your veneers.
