for lime deposits around the rim of pots. I have found ordinary table
vinegar and a brush usually does the trick.

I use Lime-Away or toilet bowl cleaner. If you are careful, you can use either
of them on a planted pot in preparation for a show. Rubbing baby oil or mineral
oil on unglazed pots removes the last traces for show purposes.

Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)