Hi Rodney,
Since I fly almost exclusively glow powered airplanes I have to use a fuel proof finish. Clear epoxy or polyurethane are my current choices.
I assume you will be scratch building the Rubin. The only 'kit' of the Rubin that I am aware of was the Model-tech ARC version. Well built and straight, but heavy. A Rubin with a YS 160 should have plenty of power! I don't have Rubin plans, but I do have plans for the following Matt design the Diamante which will get in the build queue one of these days. I'd like to respectfully request a build thread for the Rubin as I have really enjoyed following the Zeus build!
Regards,
Will