On Sat, 10 Dec 2011 18:39:40 -0600, Ignoramus20184
wrote:

I have a couple of those

http://igor.chudov.com/misc/ebay/tmp/J-G-Porter/133.JPG

They have white concrete on them, some solidly stuck. How can I remove
it safely to restore the good looks. Thanks


Ugh. If you're brave, muriatic acid should do it.

--
Ed Huntress

My first approach would be diluting some phosphoric acid (etchant for
automotive primer, metal-prep).
Mix in a Labeled trigger spray bottle, and wet the residue, checking
adhesion and re-wetting as needed.

I believe the muriatic would work, but it's a much nastier product to have
around machines.

Some of those tile cleaners like lime-away (can't recall the one with 3
letters), which contain phosphoric acid may be effective, too.

When the residue begins to release, a stiff bristle brush would likely
remove most of it without stripping off the epoxy? case paint.

--
WB
..........


"Ed Huntress" wrote in message
...
On Sat, 10 Dec 2011 18:39:40 -0600, Ignoramus20184
wrote:

I have a couple of those

http://igor.chudov.com/misc/ebay/tmp/J-G-Porter/133.JPG

They have white concrete on them, some solidly stuck. How can I remove
it safely to restore the good looks. Thanks


Ugh. If you're brave, muriatic acid should do it.

--
Ed Huntress

In article ,
Ed Huntress wrote:

On Sat, 10 Dec 2011 18:39:40 -0600, Ignoramus20184
wrote:

I have a couple of those

http://igor.chudov.com/misc/ebay/tmp/J-G-Porter/133.JPG

They have white concrete on them, some solidly stuck. How can I remove
it safely to restore the good looks. Thanks


Ugh. If you're brave, muriatic acid should do it.

But don't forget the heavy rubber gloves. While muriatic acid (which is
largely hydrochloric acid) isn't wildly dangerous, it will take your
skin off if you let it.

And also use goggles.

Joe Gwinn