Some detailers use orbital polishers on windshields. Takes a careful hand and a good product, but can be done. No different than doing polishing on car paint.

My husband’s career was in electroplating chrome. They used Bar Keepers Friend all the time.
Shines and polishes but is non abrasive

According to the Bar Keepers Friend website, the cleanser is abrasive.

Ingredients
Glass Oxide Abrasive, Oxalic Acid, Surfactant.

Been using Bar Keepers Friend for years, great product.

Sounds like someone found a way to use cheap volcanic stone and package it. "Pumie" that erodes as you scrub, and looks like a pumice stone is more likely than not just a branded pumice stone. Just sayin.

I use it to remove tea stains from my mugs. Also use it on my pans and sink.

Yes! Also copper bottom Revere ware if you have any of that still hanging around. Shines up like a new penny.

Baking soda works really well for tea cups and mugs that have tea stains.

Just put a half tablespoon of baking soda into mug/cup and a tiny bit of water and scrub to get tea stains out of fine china and your favorite tea mug.

Yes, good question.

There is a liquid version of BKF and I'm tempted to use it on my glass stove top.

I use a wet cloth and lay on top of stove top to get everything possible to loosen up. But then there are still those tiny deposits that need to get lifted off the glass. Anyone use BKF or the liquid form for this? I don't want to etch the glass top.

See post #7 No scratching on my stove. But it's the soft cream cleanser.

It works and won’t etch the toilet bowl

I could be wrong, but I think the liquid version is the same as the powder, but they dilute it in water.

I use lime away for removing toilet calcium deposits. Works great.

They make a Bar Keepers' Friend just for glass cooktops. I use it on our Bosch induction - no issues past 6 years and counting.

https://i.imgur.com/noeH6FV.jpeg

I've used it to restore some rusted old golf wedges. Cleaned out the grooves on the clubs and shiny now.