Seing this, and having tried to have re-coated a front lens damaged on cleaning, I thought it could be of some help.
Alas, an optic teacher I know said to me "Single layer MgF2 coating ? It is a circa 1935 technique. Not so good by today standard."
So, it could be good for an uncoated lens, but do not expect tremendeous results.... if I understand what this guy said to me.