On Sun, 13 Jun 2010 00:55:40 -0700, Roger Shoaf wrote:

What's in limeaway anyway (that etched away the satin coating)?

It is an acid.

Strangely enough, it doesn't say what it is on the bottle.
I called the Reckitt Benckiser consumer information line on the bottle
800-228-4722, but they're closed weekends.

This web site seems to give the facts:
http://householdproducts.nlm.nih.gov.../scale+remover

Lime A Way Extra Lime Remover:
* Citric acid 3.0%
* Hydroxyacetic acid 10.0%
* Sulfamic acid 7.5%

Lime A Way Heavy Duty Hardwater Stain Cleaner:
* Sulfamic acid 11%

Lime A Way Tub and Tile Lime Remover:
* Citric acid 3.0%
* Hydroxyacetic acid 5%
* Sulfamic acid 1.5%

I never heard of "sulfamic" acid so I went to wikipedia:
http://en.wikipedia.org/wiki/Sulfamic_acid
which said:
"Sulfamic acid (H3NSO3) may be considered an intermediate compound between
sulfuric acid (H2SO4), and sulfamide (H4N2SO2), effectively" and that it
is used in sweeteners.

Hmmm... I wonder if a packet of artificial sweetener would work as well???