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Uncle Marvo · 06-08-2007, 02:51 PM posted to uk.rec.gardening

In reply to Uncle Marvo ) who wrote
this in , I, Marvo, say :

In reply to Barb ) who wrote this in
, I, Marvo, say :

Hi, I've got some horrendous rust stains on flagstones, from old cast
iron pation furniture.

What's the best way of cleaning these? Can it be done? I've tried
all sorts of the usual things and nothing really seems to work ...

Have you tried the trusty Karcher, using the solid (rather than fan)
jet, at very close range? Works for me. Presumably the stains are
well into the flags, but not over a very wide area?

There are other chemical means but they are largely unsafe.

PS if you leave vinegar on a rag (to stop it just evaporating) on it for a
long while first it helps.