Which Paint?
I used filler for any gaps in the joints then prepared the hull with sanding sealer having got it really smooth.
For the rest of the paintwork I first used Halfords primer then used their acrylic for the final colours. I gave it four coats of colour leaving it over a day between each coat. When painting was finished and after checking it was fully dry, I rubbed the hull down lightly using Maguires scratch remover, (also from Halfords) and got a nice shine between the deck and the red waterline.
It seems to have lasted well as it has not crazed over this amount of time.
The total cost of the primer, paint and especially the scratch remover was not cheap but in the long run it did work.
Boaty🤓