I have just finished cleaning our Rub using Polymarine cleaner followed by a polymarine finish. Took about an hour and am delighted with the finish.
I suggest you use an eradicator pad from marine a glaze. It takes two to do a 7m boat. Firstly go over with either ribshop rib revive or a glaze rib and dinghy cleaner. then either ribshop conditioner or a glaze sealant. I do this once a year to keep the tubes looking tip top