This looks like a great product for covering foam models. No need for covering with fiberglass and varathane, etc...
http://www.wowplanes.com/product_info.php?products_id=130
Anyone has experience with using it?
The company WOW planes also sells this product (Excuse me I didn't look at the link). They do a similar method / process on their kits. When I saw your Lancaster (Beaut), it reminded me that they also came out with a Lancaster kit. Take a peak at the instructions they have posted. It could help with the build (sorry off topic). ;o)