Using an abrasive such as BKF on porcelain will scratch it. From then
on cleaning it will be more difficult.

On Fri, 27 May 2005 08:11:31 -0700, nospambob
wrote:

Wood bleach that is Oxalic Acid, active ingredient in BKF, may work
better. Read the label as there are other wood bleaches.

On 26 May 2005 14:22:14 -0700, "
wrote:

Has anyone used BKF for lime scale in a porcelain toilet bowl?

BKF says it can be used on sinks, baths, etc., but they don't mention
toilets.

Seems like it might be effective. We've had a problem and neither CLR
nor vinegar has not been helpful!

Any comments appreciated!