[chumbucket]

All the wood is easily removed and can be refinished or replaced with very little effort. It should be all teak. If you like the look of the wood trim, get yourself to a boating supply store and buy a teak cleaning/oiling kit. Basically, it consists of a one step cleaning process that'll also brighten the teak, then rubbing the wood with teak oil. Once that's done, just re-oil every few months. Another option is to apply a stain such as Sikkens (excellent for teak and lasts a lot longer). If someone has varnished or polyurethaned the wood in the past, it's going to take a bit more work. Break out the sander and go to it. I ran all mine through a planer on an older boat that I had and stripped the wood bare.
The other option is to pick up some Starboard plastic, using the wood pieces as a template, cut and replace with no maintenance pieces (this is the way I'm going a little at a time). I personally don't like having to deal with maintenance issues such as wood. ;)