Halekai, do you have the time frame on the deterioration shown in your first picture? And do you know which of the "miracle" coatings it was?
Our poliglow is definitely subject to wear and abrasion, as is any finish, and does have to be kept up, as does any finish other than good paint (and even that needs some TLC after a bit)
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)