Find a local glass shop. If you wish to email me here I can possibly help direct you. As far as the coating there is one and only I would entertain using and that is "Showerguard". It is done when the glass is mad and not an applied product. It is not inexpensive but it works. The coating is not so much for "waterspots" as they will occur not matter what you do or what type of coating is applied unless you squeegee. The Showerguard stops the soap, hard water deposits from ending up in the pores of the glass as once that happens you cannot get them out. Think about a glass that is used everyday and run thru the dishwasher repeatedly with hard water, it gets a milky appearance, same thing will happen to your shower glass over time.

Thanks for the info. Is there a local shop that you would recommend in Nassau County, Long Island (or even Suffolk county, not too far east)?

Email me please as I do not post peoples contact info oin a general info forum.

Happy to but I don't see your email address.Can you provide it? Thanks

millwork4u@gmail.com