A couple of years ago i scratch built a 1/24 scale Vosper Long boat MTB 510. I spray painted the hull and super structure with Halfords white and gray primer. The Hull was given coat of Matt clear laquer Spray (Plasticote).
The deck and super structure were also coated in a matt laquer spray. This product was Rustoleum Crystal Clear Matt Laquer. I have used this product before on acrylic base paints, and had no problems. Do not use on oil based paints as it will crinkle the surface.
The Plasticote product i used on the Hull was fine at the time but a couple of years on the surface has become crazed. so i will have to repaint the complete hull sometime in the future.
Can any one out there recommend a paint combination or product that is satisfactory, and will not craze like an old masters oil painting from the 1500s.
I've always used the Halfords rattle cans for all my boats and never had any problems. Are you using a tacky cloth before you sprayed your boats ? As I have found it helps to remove any oily/greasy deposits , I always wipe down after each coat of paint after rubbing down with wet and dry 2500grit paper .
Former tug nut now switched to sail because of health
4 years ago I restored an old 34 inch Aerokits Crash tender.
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.