Brian, even with all paint, the 300 gram wing weight ( I assume about 600 squares) is within reach. I build mono panels at around 550 squares all paint and no honeycombing, and get about 330-350 grams panel weights. Equipment adds around another 60-70 grams.

About the only base color which would finish heavier is yellow. Yellow just doesn't cover as well as the other colors do, and I've tried dope, polyu enamel, epoxy enamel, water based acrylic, and the dope variant-- S T I T S. Many years ago DuPont made a great lacquer in yellow that covered well applied light. It no longer exists of course.

I have not tried any of the Chroma colors from DuPont and I know from talking with Bob Hunt (CL) that Chroma is really terrific stuff. But then again it's from DuPont with the appropriate sticker shock