Good day David. First off, don't be too hard on yourself about this. Many
people have done this to sidewalks..etc with fertilizer. This issue is
that the fertilizer had/has iron in it. Your not going to get it out of
the stone/sidewalk if it's _real_ bad, but only lessen it.


Thanks for the encouragement, I tried vinegar with no success - will try my
powerwasher this weekend.

I thought gardening was meant to be relaxing.

David