I see we're sharing.
My first experience with iron-on coverings was Solarfilm (I think... over 20 years ago). I covered the entire plane (a Mambo) without ever realizing the stuff had a backing that had to be removed.
The stuff worked ok... go figure.
My latest boneheaded move? Sheeted the L.E of my Waco and forgot to install the modified strut mount I'd just spent several hours perfecting.... Now I'm trying to install it through the sheer webbing I removed.