Yesterday I got tired of waiting for it to warm up so I took R3's holo outside and sprayed it. Then ran it inside before it froze to dry. If it works I will do some other small pieces like this.
Today I took a look at the holo. No flaking, cracks, or runs. I will let it sit a few extra days before I mount it as it is not warm enough to fully cure in just 48hours. Maybe I will repaint Patches boosters next :D
Got to love OmaHoth weather :P