Kohler specifically recommends against a wide variety of abrasive and/or acidic cleaners.
https://retrorenovation.com/2012/11/19/kohler-says-no-to-magic-eraser-comet-bar-keepers-friend-zud-vinegar-for-cleaning-its-porcelain-enamel-cast-iron/
Comet (of course, my mother knew Comet was bad for bathtubs 50 years ago...and used Bon Ami).
Me, I should have learned the hard way after many times.
Bar Keepers Friend (they advise against regular use)
Magic Eraser (use sparingly only)
What they do recommend, above all else, is ROG 3, and expensive chemical cleaner.
They do not recommend ROG 1, which includes a mild abrasive, however that might be the best of abrasive type product to use when absolutely needed.
Interestingly enough, the claimed inventor of ROG 1 and 3 chimed in. He also said he designed the anti-slip coating (achieved through a kind of sand blasting, he said) and then the ROG 3 cleaner to be used with it. He said he worked with Kohler on that, and knew the surface engineers at Kohler very well.
And he answers the question what to do about caulk. Flat razor blade, he says, followed by ROG 3 to remove the "silver."
Well, that "silver" puzzles me. Does he just mean the metal, or is using silvered blades, perhaps double edged blades like Gillette Silver Blue???
I looked for "flat razor blade" and I saw all the scrapers and single edge blades I'm familiar with, and nothing else. I looked up silver gillette bathtub cleaning and got nothing. (The Gillette Silver Blue is one of the sharpest blades available, but only in the now dominant Gillette double edge razor blade.)
One thing not mentioned, to go along with how Kohler has changed their recommendations over the years, is certainly the porcelain itself has changed! The older leaded porcelain that's now dangerous was probably easier to make harder. So now recommendations have to deal with unleaded porcelain.
I'm not absolutely sure about whether the old leaded porcelain was tougher, but I am sure the porcelain has changed a lot, and perhaps not always in the more robust direction.
https://retrorenovation.com/2012/11/19/kohler-says-no-to-magic-eraser-comet-bar-keepers-friend-zud-vinegar-for-cleaning-its-porcelain-enamel-cast-iron/
Comet (of course, my mother knew Comet was bad for bathtubs 50 years ago...and used Bon Ami).
Me, I should have learned the hard way after many times.
Bar Keepers Friend (they advise against regular use)
Magic Eraser (use sparingly only)
What they do recommend, above all else, is ROG 3, and expensive chemical cleaner.
They do not recommend ROG 1, which includes a mild abrasive, however that might be the best of abrasive type product to use when absolutely needed.
Interestingly enough, the claimed inventor of ROG 1 and 3 chimed in. He also said he designed the anti-slip coating (achieved through a kind of sand blasting, he said) and then the ROG 3 cleaner to be used with it. He said he worked with Kohler on that, and knew the surface engineers at Kohler very well.
And he answers the question what to do about caulk. Flat razor blade, he says, followed by ROG 3 to remove the "silver."
Well, that "silver" puzzles me. Does he just mean the metal, or is using silvered blades, perhaps double edged blades like Gillette Silver Blue???
I looked for "flat razor blade" and I saw all the scrapers and single edge blades I'm familiar with, and nothing else. I looked up silver gillette bathtub cleaning and got nothing. (The Gillette Silver Blue is one of the sharpest blades available, but only in the now dominant Gillette double edge razor blade.)
One thing not mentioned, to go along with how Kohler has changed their recommendations over the years, is certainly the porcelain itself has changed! The older leaded porcelain that's now dangerous was probably easier to make harder. So now recommendations have to deal with unleaded porcelain.
I'm not absolutely sure about whether the old leaded porcelain was tougher, but I am sure the porcelain has changed a lot, and perhaps not always in the more robust direction.
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