I saw your posting about the staining that naturally happens over time to the hulls. I have had amazing good luck with a product that make clean up easy. Take a look at "FSR" by Davis Instruments. I have an babied 84Hobie16 with special edition blue hulls. My hulls were truly green from all the yellow satining on them over time. FSR pulled the yellow away and the difference was immediate and noticable as I progressed alonog the hulls. I loved that it did not involve buffing or a bunch of elbow grease.

Good luck!
Doug.

(No affiliation to FSR or Davis Instruments)