I am going to do some work on the interior woodwork inside my Hunter 22. The boat has a coat of stain on it on the inside and some of it is in great shape. It seems like the previous owner was working on the woodwork and stopped short of the varnish phase. The wood is in great shape but in a couple of places the stain has faded a little. What should I do to get the stain in those areas even? The other thing is what type of varnish should I use and does it really matter between varnish products? Would I be okay using varnish from the local hardware store since the woodwork will be in the interior?