Ray. that looks great. Blue Swirls are so cooooool, the deck side is that paint or did you resin tint that as well? sorry I am not any help for your questions but good work anyway…
Hot-coat, sand, then re-write over your previous writing using a posca pen with a fine point. Works great, just allow to dry before glossing. Not experienced enough with colors to answer the other questions, except maybe about color transparency on deck side: did you use white pigment to get that light blue? If so, use less. Tints stay clear, pigments tend to opacify (is that the correct word?)
If you want it more transparent, use a tint instead of opaque colorant. Just put a couple of drops of white to get a slight hazy color if necessary. Also if you want to have your signature show up write your name & specs on some rice paper, do your lamination. Then put the rice paper on top of the lamination the hit it with a smidge of lam resin, let kick, and hot coat the whole thing.
Both boards that I’ve done to date have been cutlapped and swirled, so I signed them on the deck near the tail where you don’t wax. I like that the swirl on the bottom stays uninterrupted that way, also if making a board just for myself I have never really seen the point of writing the dimensions out, if I want to make another one you can just measure the original. Just my opinion, though.