I once knew a woman that wanted a job. I saw her after the interview. Average had become stunningly beautiful. I knew it was a glamour but I could not see through it. The next time I saw her, she was as I knew her. To me, this is how a glamour should be used. There is a task at hand, glamour is needed for that task, use it then lose it.
I once knew another that used glamour to be perceived in a certain way by his friends and associates. This sort of glamour must be maintained on a permanent basis. The problem lay in the fact that if those qualities were actually possessed, the glamour would not be needed. This leaves one in the trap of living a lie. Worse, because people treat you as if you possess these traits, one tends to believe one's own press. This has several ramifications.
1. The aforementioned need for more or less constant maintenance.
2. The pressure of having to live up to said deceit I don't care who one is, how smart one is or how clever one is, that is a strain. It is a strain because one is living outside who one really is.
3. One never grows into what one wants to be or thinks one is because one falls victim to one's own illusion. In short, growth stops.
Glamours can be useful. They can also be traps.