Cheers Steve
I done the rails this way as I opt to spray them off the boat. As painting them would be a pain in the butt. Anyway most of the white acrylic paints now a days is that thin its like painting milk on the railing. Although I have found 2 paints that have a little more body to them. The first one is from the Games Workshop called Citadel, Ceramite White a base and with a little water added it has a reasonable coverage. Second one is Model Colour''s Acrylic, White, RAL 9016 it to is good. Ammo's their Signal Green A-.MIG-054 is almost a good match for Halford's Ford Mondena Green which I use for the decks
I don't use Humbrol or Tamiya paints anymore