pattern ease and polyurethane...
 

Folks,
In my never ending search to find cheaper, stronger, more versitile ways to cover my planes, I read about using polyurethane as a poor mans epoxy. I found a "fabric" called pattern ease at the fabric shop. it is a lightweight, random weave polyester. When ironed to remove wrinkles, it can be applied to simple structures ( no compound curves) with oil-based polyurethane and dries nice and tight. My question is: has any one else used this technique and if so, it is wise to double-up on the fabric (ie, apply a second fabric layer)?
I have read where some folks use a similar techique prior to glassing open structures. But has anyone else used the technique as stand alone? I have used it on a "butterfly" trainer, I am currently rebuilding an LT-40 with it and am considering using it on a BalsaUAS fokker DVIII. any input or other experiences would be greatly appreciated.
cheers,
Bob