Notes on the latex liquid mask.
My experience with the latex liquid mask....
whether you are rolling, spraying or brushing on, definitely be sure to get adequate build-up. The liquid loses a lot of film thickness as it dries, and you end up with a paper thin glue that can be impossible to remove. ( this has happened to me on acrylic sign faces numerous times).
a paper thin coat is bad, add coats until you have a decent film, perhaps the thickness of card stock. When you go to remove, it is strong enough that it will peel in big sheets.
Caution: the film dries out over time, and becomes brittle. If it is too dry to peel, adding another coat often rejuvenates the layers beneath.
This stuff also tends to collect dirt and dust, the static charge of the plexi, plus the tackiness of the mask are a bad combination. Be sure to blow off before handling, little specks of grit and metal shavings love to embed in the mask, and if wiped, create the scratches you are trying so hard to avoid!
Try not to wipe the canopy unless you are actually going flying!