They stopped the 3/16" and 1/4" plates which were the most sensible. From Mcmaster I had some plates several months apart that were different thicknesses in the 3/16". Not much but in 3d printing enough to make a difference.

Ya you might have lucked out in the hair spray. It isn't the hairspray, it is what is in the spray that makes it work. Some have silicones and those definitely are out. I think it is the sprays with Vinyl Acetate and no silicones that work.