On 28 Oct 2018 15:32, Roger Tonkin wrote:
Due to me leaving a packet of ferrous sulphate out over a rainy
night, I now have a small area of my pation stained orange.

I've tried scrubbing, which helps a bit, but looking for
something easier and more positive, like: a high pressure hose
or some magic chemical.

Whatever, it must return the slabs to the original state to
match the rest of the patio, otherwise swmbo will continue to
moan and nag


I'd try a pressure washer first, use the turbo head (not patio cleaner
head) on the marked patch. May have to do the rest though with the
patio cleaner head.

--
Regards
Bob Hobden