In message ,
Muddymike writes
On 28/10/2018 15:28, Roger Tonkin wrote:
Due to leaving a packet of Ferrous sulphate out on a raily day,
I've now got rusty slabs!
I've tried scrubbing them, which has helped a bit, but am
wondering if there is anything I can do to clean them up
properly, borrow a hgih pressure spray?, apply some chemical?
Whatever as it is only a small area, it must leave the slabs
looking like the remainder of the patio, otherwise swmbo will
continue to moan

I don't think a pressure washer will do it as I've had the same on
paving adjoining the lawn and the annual pressure wash didn't take it
off, mind you it was months in between.

Try brick cleaner that may work as its very good at removing rust from
steel.

Mike

Any possibility of painting the affected slabs with a matching colour?
Anyone who has spilt a tin of paint on paving slabs will confirm that
even if immediate attempts are made to remove it, the tell-tale signs
can last for years (if not for ever). Several coats of well-thinned
emulsion, artistically dabbed on, might help the stained slabs to blend
in.
--
Ian