Glazed our tub 3 years ago and it is still beautiful. We were offered a cheaper glaze for $100 less but I plan to live here a while so we paid for the better glaze. Our bathroom has block glass without a vent. The ceiling vent wasn’t strong enough but no problem. The tech had a giant hose he used that reached across the hall to the bedroom window with a fan.Re the other review; every one is entitled to a bad day

Called to ask questions. Obviously, she was having a bad day. Too bad I have 12 tubs that I would have liked to get refinished.