Hi folks. Just about to spray a hull with Halfords acrylic spray. The hull is made of an ABS type plastic. All has been filled with car body filler and sanded down with 600 grit wet and dry. The top half will be grey primer followed by gloss green. The bottom half will be red primer only to represent anti fouling. All paint is Halords acrylic. My first question is this. The original hull had ' pod ' type motors in it and have been removed from the bottom of the hull. Quite a bit of filler has been used to fill in the indentations in. If i use the red primer for the bottom is it porous and will water soak into the filler? Secondly, which way round should i paint it? All grey first followed by the green mask off and then the red? Red first mask off and then do the grey primer followed by the green or any other number of combinations? ALL thoughts gratefully received, regards, Dave.