Boat cleaning

[Big Flounder]

I am doing some very much needed boat cleaning and since I can only do it after work for about 2 hours before dark today was day 1. Started at the front deck. I pulled the anchor out and washed it, the rope, the storage compartment, and the other storage compartment under the deck. Didn't realize the drain for the front fishing seat pole was stopped up so I took it apart and blew it out. There is a rubber piece that runs all the way around the boat at the top on the outside that is supposed to be white that I have never been able to get white again and it is driving me crazy! Do you guys know if this piece can be cleaned? I have a black and white Nautic Star and was thinking about replacing it with a black one but not sure how it would look or if it can even be replaced. I also plan on replacing the fold down cup holders, rod holders, and speakers to black cause they are all supposed to be white but they have turned yellow. One more thing. What kind of wax do you guys use?