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?

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?

if they are not too bad , sweep up any loose debris or dust , tyhen try
some CSR or similar product. If it dissolves the rust stain , hose off
, or flood with lots of water .

On 10 Aug 2006 16:36:08 -0700, 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.