Helpful to have shield protective coating on shower glass door?
I have some brochures of glass doors. Adding some money, I can have some treatment that claims to make hard water difficult to leave water spots and be easier to clean. Glass doors of different brand have different name for this kind of treatment, e.g., HydroShield, Diamon-Fusion Protection, or CW shield protective coating.
I saw a local glass door shop which has good price but does not offer any coating. Does the coating helpful in preventing hard water spots and making cleaning much easier?
Any help or sharing of experience is greatly appreciated.