I've been in my new-construction house for six months and want to get rid of
the stains on the driveway. It looks like there are three different types
of stains: rust, oil, and bird poop. Any ideas about what to use?
Rust: muriatic acid (= hcl) , or Naval Jelly (phosphoric acid) spray -
others may select the best from these two possibilities.. Use stainless
steel brush., then rinse.
Oil: Cat Litter. Pour on spot liberally, grind in with your heel to turn to
powder, and let sit there a few days, about 1/4 to 1/2 inch thick layer.
Poop: Easy. Try putty knife, then high pressure hose or good small-stream
nozzle on garden hose.
wife gets a can of oven cleaner from the food store.. it will eat grease
and get rid of most stains.... thats why you have to be careful with it
when spraying it in an oven... get the good stuff.. we tried the trash
they sell in the dollar stores,, but i guess thats why its in the dollar
store, the stuff they sell does not work......
Be cautious trying to remove rust with muriatic acid or hydrochloric
acid (chemically the same thing.) In all likelihood all you will do is
etch the concrete and still have rust stains. There are numerous
cleaners intended to remove rust which are based on oxalic acid. Many
are intended for use as bathroom cleaners, just look at the ingredients
or go to a good paint store and buy a small container of wood bleach
(oxalic acid). Dissolve the oxalic acid in water, it's highly soluble
so don't start with too much water and use that. Oxalic acid reacts
with the rust and creates iron oxalates which unlike rust are soluble in
Oil is best addressed with absorbents like clay as in kitty litter, and
then solvents. A good auto supply store should have oil removers for
concrete. No profound thought on the bird issue.
Margie Davis wrote:
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