Please head over to RC Scale Builder. Look for posts by awrightbrother (his real name is Fahim, a heck of a great guy)
The fine gentleman who uses Liquid Sheeting has built a B-26, and a A-10 using foam and liquid sheeting. Does a heck of a job with it.
His company is WOW Planes, found here,
http://www.wowplanes.com/
He sells foam kits and liquid sheeting.
This is an A-10 done with Liquid Sheeting: