Re: Blue topsides
Dark colours show up imperfections in fairing much more readily than lighter colours, and also, esp in salt water, REALLY show the dried salt. However that may be a good thing as you're motivated to rinse it away as often as you can.. not entirely a bad thing.
I know one fastidious owner that sponges the boat down at anchor after sailing for the day.
But if rolling and tipping leaves you with 'brush marks' they'll be much more visible in a dark colour. Look into reducers formulated esp for rolling and tipping, and I believe there are additives available to help paint 'flow' out more readily (hopefully without running!!)
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)