The pervious owner of my boat had refinished all of the interior woodwork. He didn't varnish it though. The result is there are some areas that I need to coat with varnish, after cleaning, and some areas have faded and they will need sanding and staining before varnishing.What is the best way to clean the areas that just need to be cleaned before varnishing? Any other suggestions would be greatly appreciated, especially time saving suggestions!