Bar Keeper's Friend for Toilet Lime Scale?

yes. it does work somewhat, but not as well as stronger acids.

A cleaner meant for use full strength on surfaces would probably be too diluted in the toilet water to be very useful. If you got most of the water out of the bowl first then you should have its full effacy.

I have been able to buy quite strong hydrochloric acid based bowl cleaner at the dollar store near me. this stuff is quite a bit stronger than any of those you mention for far lower cost.

I've had rust stains that refused to be removed except when I layed a rag soaked with CLR on top of it for almost a day. The extended soak time finally worked.

bkf is 100% oxalic acid, or wood bleach. i don't see how it would work 'better'.

The lady that does our cleaning at work likes Zud. She does wonderful cleaning with it.

For serious buildup use a pumice bar. At least that's what I think it is. It looks like an enongated bar of stone but is softer than the toilet and harder than the buildup so it doesn't hurt the toilet. It isn't meant for regular use but does the job quickly.

Of course regular cleaning keeps the buildup from gaining a hold.

Phisherman wrote in news: snipped-for-privacy@4ax.com:

I checked the BKF can I have and it says it contains mild abrasives. So,it could not be pure oxalic acid.

I've had to remove the water from my bowl, and pour in muriatic acid concentrate to get the limescale. Not for everyone to try, you know.

Follow that, with scraping using the plastic handle of the toilet brush.

"Stormin Mormon" wrote in news:LePle.16256$ snipped-for-privacy@twister.nyroc.rr.com:

Wouldn't that etch the porcelain finish?

I believe acid is what's used to etch porcelain bathtubs for refinishing,to get the epoxy to adhere.

Don't know off hand. Maybe there was enough calcium that it used up all the acid.

Looks better now than before. I know that much.