View Single Post
  #3  
Old 05-23-2013, 11:57 PM
ted putnam's Avatar
ted putnam ted putnam is offline
LawnSite Platinum Member
 
Join Date: Dec 2007
Location: Arkansas
Posts: 4,085
Quote:
Originally Posted by rlitman View Post
You need an acid cleaner to get rid of the rust stains, but any acid will etch limestone.
I would suggest you find an oxalic acid cleaner (often labeled "wood bleach"). Oxalic acid will be milder on the limestone than other acids, but attacks rust by turning it into a water soluble CLEAR chemical (iron oxalate) that will wash off.
I accidentally sprayed iron (lower dose) on a freshly installed fence. It turned the fence grey in less than a minute. I think I bought some of what you are talking about from the hardware store. It was called "Wood Brightener". It worked great(and fast) for what I used it for. I couldn't begin to tell you if it would work on cement or limestone though...
__________________
"The Poor Fish" circa 1930's: The Poor Fish wouldn't have been caught if he'd known enough to keep his fool mouth shut.
Reply With Quote
 
Page generated in 0.03300 seconds with 7 queries