gary wrote:
I live in Riverside, California (halfway between Los Angeles and Palm
Springs).

My house is 35 years old.

Six or seven times during this period, I've applied UN-DILUTED Muriatic
Acid to clean the concrete slab on my patio. Now the slab is now very
rough (it hurts to walk on with bare feet).

OK, first off: STOP THAT.

What you've done is etch away to cement and exposed the sand and
aggregate. Over time this will wear smooth again, but you may not want to
wait.

Although I can't pour another thick layer of concrete over the existing
slab, can I apply a thin overlay to cover the old, dirty, stained and
pitted concrete to result in a smoother and good-looking slab?

Rent a concrete floor grinder and you should be able to take off the high
spots: then relax and stop typing to keep the concrete pristine white: let
it gain character and -be- the zero maintenance surface it's supposed to
be.

Overlays and coatings are a crummy solution to the problem IMHO.



John
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