Building a top flite P51 and have the horizontal and fin nearly completed, cant finish the fin until it is attached, but is there anything I can seal the balsa with before covering it? Something that can harden the wood a bit, and help protect it until I have the plane assembled and covered with Monokote?

The horizontal looks good, so does the fin. Been quite a while since I built a plane, but its coming back. used some balsa filler to smooth out where the ribs were a bit low. Looking good.

Oh, can Monokote be applied to the plastic cowl and radiator scoop?