Re: boat wax
Thanks to some great suggestions from this board, I was able to cut the oxidation and chalk from a mildly neglected black hull on our boat after some major elbow grease and the correct compounds and polishers. Now that it looks new, there is NFW I would let it go without a proper sealant and wax to not only keep the shine, but make it very easy to keep clean and maintained with much less effort.
Most would recommend avoiding the high maintenance of a dark colored hull as it shows every imperfection, but the right preparation and products make it relatively low maintenance. While we do not get the heat in the Rockies that the Floridians do, the sun at 9,000' elevation is hugely intense. We also get hard water from the minerals here. Wax keeps both at bay, keeps the new look, and saves me hours of hard work.
IME, gelcoat is a you can pay me now or pay me later product. May as well take care of it, get your money's worth, and in the end save yourself some time and headache.