Put on some old clothes you don't care about. Shoes too. Rubber
gloves, rubber boots, and some goggles would also be in order.

Typically, reduce the muriatic about 5 parts water to 1 part acid. I
have used it straight, pouring it onto pre-soaked concrete. Push it
around with an old stiff bristle broom, or you can buy cheap fiber
bristled acid brushes. It will foam up with a yellow color and the
fumes are quite breath taking. When it quits bubbling, it has kinda
used up its thunder. The longer it sits the deeper it etches the
concrete. Wash thoroughly to dilute the acid and stop the etching
effect.

Muriatic Acid will hurt - metal (especially steel and aluminum), cloth,
skin, eyes, cementitious materials

Muriatic Acid will not hurt - glass, crockery, plastic, rubber, bricks

I did tell you to wear old clothes that you don't care about didn't I?
Take all the other normal precautions when using something that can hurt
you.


--


Keep the whole world singing. . .
Dan G

(remove the 7)



"William Redding" wrote in message
...
I have to pressure clean my driveway. It is stained brown from years
of well water overflow.

I understand that using a water pressure machine and muriatic acid is
good for this type of cleaning.

How is the acid applied to the driveway and how much?

Thanks

Bill

On 8/3/2003 7:13 AM, mark Ransley wrote:
Dan G covered it , But i also recomend you stay upwind and use a
chemical respirator, acid is bad for your lungs, and cover nearby plants
with plastic the fumes are very very nasty



Mark, please do us a favor.

http://www.watchingyou.com/webtv.html


6. Learn how to quote. When replying to a message, quote the portion
you are referring to so that people will know what you are talking
about. If you do not know how to do this, read the information
contained on this page. If you don't quote the portion of the
message you are referring to, chances are you will come off looking
nonsensical.
6. Learn how to quote. When replying to a message, quote the portion
you are referring to so that people will know what you are talking
about. If you do not know how to do this, read the information
contained on this page. If you don't quote the portion of the
message you are referring to, chances are you will come off looking
nonsensical.

How to quote messages with your WebTV
# 1. Put the cursor anywhere in the text of the message being
responded to.
# 2. Highlight the entire message using CMD-A.
# 3. Copy the highlighted text using CMD-C.
# 4. Click on the "Respond" command on the menu on the left-hand
side of the screen.
# 5. Paste the copied text using CMD-V.
# 6. Edit out any unwanted portions of the pasted text. (Depending
on the amount of material to be cut, this can be done either with the
backspace key, or, for larger deletions, by using SHIFT and one of
the arrow keys to highlight a block of text, then deleting using
CMD-X.
# 7. Edit the attribution header a bit -- at minimum, just adding the
word "wrote" or some equivalent to the original poster's name from the
copied text.
# 8. Indent the quoted text, using one or more ""s (depending on
level of attribution) followed by a space at the beginning of each
line, and entering manual returns at the end of each line.
# 9. Then compose the reply.

In article ,
osspam says...


I have to pressure clean my driveway. It is stained brown from years of
well water overflow. I understand that using a water pressure machine and
muriatic acid is good for this type of cleaning

Let's consider a slower acting acid with less tendency to etch the concrete,
like oxalic acid, the main component of commercial auto radiator flushing
compounds. All you want to do is remove the stains, so any mild acid that
converts the iron stains to a soluble form should be a candidate. For now,
buy
a can of radiator flush and apply a paste of it to see how long it takes to
have an effect, then go for a larger size if it responds. There may also be
industrial compounds from, typically, janitorial supply stores or
McMaster-Carr, Graingers or similar. Do your research, then decide. Good
luck.

Joe


Rustoleum has a new product out that claims to be fumeless, and
quicker. I 've never tried it, but I would look into it.

Dennis

Thanks much forall the help everyone.

bill

"William Redding" wrote in message
...
I have to pressure clean my driveway. It is stained brown from years
of well water overflow.

I understand that using a water pressure machine and muriatic acid is
good for this type of cleaning.

How is the acid applied to the driveway and how much?

The first thing you should do is simply power wash it. There's a good
chance that will do it (rent a good power washer.) Muriatic acid will
actually etch the concrete, which you might or might not want to do.