Hi, I've tried using the search function to find information on maintaining a tung oil finish on koa, but after a few permutations of keywords I wasn't able to find threads relating to the care of the finish (only ones relating to applications of the tung oil). To make a long story short, I have a late model Carvin bass made of koa which has a Carvin factory applied tung oil finish. Over the years it seems to me that the bass has taken on a slightly darker hue and a sweet smell, for lack of a better term. I actually like the subdued darker look more than when the bass was new and almost light amber, but the subtle flame in the koa almost seems matted over and has lost its 3-D quality. Can anyone recommend a product that I can use to bring back the glisten without adversely affecting the tung oil finish? Thanks!