new here, just joined looking for an answer to perhaps pertaining to this very subject.
I have a Brig Baltic series & the gray finish on the top of the bow, ironically where everybody seems to climb in got soft and sticky last summer and when I washed it before storing for the winter it kinda washed off to the next layer down....kind of a tan color. (I'm thinking the softening was caused either by suntan oil or insect repellant)
So, by coming across this thread I am assuming painting these boats is a fairly common thing.
And, it sounds as though using an automotive type vinyl paint would be an option to sort this mess out.
I'm thinking of a product called "SEM Colorcoat" it is a Lacquer based polymeric coating or would the lacquer base just make the product worse.
near Ottawa Canada
12ft. Brig Baltic series W/8hp Honda power