There WAS a marine acrylic line. Testors/MM dropped that line a year or so ago , but hobby shops may still have them (mine does) and they are available on line.
And yes, anti-fouling red is the below the waterline color. If you don't want to spring for the WEM paint for that one, I use one of the Floquil railroad colors, Boxcar Red. Any brand of flat black will do you for the boot topping stripe, the narrow strip between the hull paint and the anti-fouling paint.