Keith G. Powell wrote:

"Keith G. Powell" wrote in message
...

"stuart noble" wrote in message
...

Christian McArdle wrote in message
et...

Good idea. I've used the same principle on the rim of WCs. 10% citric

acid

solution is much stronger than vinegar and just as easy to handle.

I use brick acid. A bit stronger still...

And dangerous to handle..... and a bloody nuisance to store. Sulphamic is
the best of both worlds, but you can't just nip round the chemist's to
buy
it. Citric was 69 pence for 100gms last time I looked.


If you have a left over lemon from a meal, there's enough citric acid in
it to clean some lime scale.

Keith G. Powell


By the way(?), citric acid attacks copper and probably therefor brass. The
solution will turn blue.

What is brick acid? Is it concentrated hydrochloric acid?

30% conc. HCL - mine is anyway.


Keith G. Powell