I just applied clorox to the problem areas (black spots on the caulk
around the trim and some plastic parts. The clorox did little on the
caulking. However on plastic parts it left them looking new. In the
caulk, I can see that the spots are not just on the surface, they are
deep and maybe even behind the caulk. I will try some of the
detergents you've suggested and then will look into removing the caulk
and reapplying something more resistive to mold and the elements. I
let the clorox sit for about 10 minutes and then tried to wash the
whole boat best I could. The gel coat on the boat is in perfect shiny
condition - it's a 99 with very low hours. I just hope all the
chemicals and clorox to hurt the get coat.

Any suggestion for product to safely remove the caulking? Good Caulk
that will resist mold and the elements, and good wax or products to
maintain the gel coat shiny and new?

Thanks for the information!