My name isn't Lumber but i can help you out a little bit. But, I dont own my V-20 anymore though.
All the teak on my 250 Sportsman was very grey and soft. I honestly dont think its been oiled since it left Wellcraft. I found that for anything over a half inch thick the best cure was to sand it down with 80 grit paper then wire brush bleach into the deep ground in crap and let it sit. I would then wire brush it then wash it off again and sand it again. I had pictures of everything on the boat when i got it but my boss lost them in his computer. But everything ended up looking a helluva lot better than it did before. I ended up making a new splashwell board, the old one is WHITE. Also for all the cockpit trim i'm gonna have to resaw a peice of teak down to make new trim. The old stuff was only 1/4 inch thick and when i finally sanded all the grey off it was a little over an 1/8" thick. Its amazing how new or refinished teak makes the boat look totally different. Also on some teak i'm planning to use Spar Varnish to do the final coat.