I refinished my Sterba by sanding smooth, spray can "urethane" varnish and flat black on backside, basic high temp engine paint. I havent done any tip color. Made a balance rig with a piece of tubing and 2 machette blades in a vise. Add a coat of the flat black to the light blade until balance achieved. I have 100 hrs. on it since finishing, and not even a scratch to report. i have been in light rain a couple times, but not for long. Fly over to 8A7 (Twin lakes) sometime. Im not far from you.
8A7 / Advance NC