Iron stains from fertilizer
During my last round of fertilizer applications I failed to blow off all of the granules of iron/fert and now I'm left with a nightmare to resolve. At two of jobs, I managed to stain their limestone pool surrounds. Luckily the stains are pretty localized, but they are BAD. I've tried rid-o-rust, lemon juice and a product called Lustro Italiano rust remover. Nothing has worked so far. Does anyone have a tried and true method? And let me go ahead and say I don't need a lecture on blowing off all of the surfaces. As I said earlier, I blew the surfaces, just missed a few spots. Thanks for your help.
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