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Posted by Phisherman on August 10, 2006, 10:02 pm
On 10 Aug 2006 16:36:08 -0700, alcarm1964@hotmail.com wrote:
>Got a normal concrete patio...a couple of places where some metal
>objects were placed now have some rust stains (grill, my charcoal
>starter chimney, etc). Is there a chemical I should use? Rent a power
>washer maybe?
Try a cleaner containing oxalic acid such as Zud, Bar Keeper's Friend,
or naval jelly. CLR is another (liquid) product that dissolves rust
and recommended for concrete--see if CLR at half-strength removes the
rust. Expect the rust to disappear but some very-clean looking spots
for some months. A power washer will help even out the clean spots.
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