When this thread came up, I had a link to a different chart on weights, but I couldn't find it. Now I did...

http://winshiprc.tripod.com/painting_techniques.htm

Scroll down to find the chart. It shows white Monokote being 7.3 g/sq.ft. and Koverall at 4.3g/sq.ft. I believe this is where I had the idea that Koverall was around 1/2 the weight of Monokote and that finished Koverall could be done for less than film. YMMV

Mark