The best thing to use is thinned out epoxy. I think they thin it with alcohol. If you use varnish, like spar varnish, stay away from anyplace you will be needing to glue or glass, to.
See N64KR at http://KR-Builder.org - Then click on the pics "There is a time for building and a time for flying, and the time for building has long since expired." Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2004 - KR Gathering See our EAA Chapter 242 at http://EAA242.org