I'm new to a 2005 Hunter 36. I've owned sailboats for years, and previously was content to clean and wax the white and gray deck and nonslip with light application of the same cleaner/wax I've used on hulls. Not sure if it's marketing hype, but the more I look, I've become more aware of recommendations to specifically use special cleaners for painted surfaces, and realize I don't know enough about Hunters or sailboat manufacturing in general to know what the gray surface is. First question - is the gray nonslip on this vintage Hunter the gelcoat, or would they have used paint? If paint, what is the recommended treatment/sealer for the gray nonskid surface on Hunters? What do you use?