Use clear ultracote instead of monokote... if done right there will be no added resistance whatsoever.

Monokote is thicker and it hardens when heated. Ultracote is much lower temp and stays more flexible. I use UC to seal every hingeline from .15 size gliders all the way up to my 33%+ planes. The other nice thing about UC for sealing is if you happen to mess it up.. it is easily stripped and re-done. Monokote, once applied, is very tough to strip.

Sealing the hinge line on a 40-60 size plane makes perfect sense - not only do you ge tbetter surface response, but it makes a great backup to the CA hinge system. While CA hinges rarely fail, the sealing certainly strengthens them on the high-g surfaces of a 3D plane.

DP