Cheers!

And somewhat more importantly, it just isn't needed. Semi-perms don't build a film, they evaporate. They are a polymer suspended in solvent, so when you apply them the polymer stays in the microporosity on the surface of your tool and the solvent evaporates. This makes spraying totally redundant, as the only reason to spray any material (paint, gelcoat, PVA, etc) is to get a smooth surface film. With semi-perms there is no surface film, so you can just wipe it on and it will leave no trace on your substrate.