E-mail Great Planes at [email protected] and let me know what they say because I'm going to contact them anyway. I've never used Balsarite before but intend to on a new scratch built wing I'm going to cover.

Bill

P.S.; I should add that my recent contacts with Great Planes have been responded to very quickly and their customer service product support is the best I've experienced in 60 years on this planet - no I don't work for them.