I can't identify with "hazy" but I cetainly did get the stripes and spots on
my first application of muratic on clean concrete. The problem seems to
have been my application: pouring on the acid and attempting to "broom" it
around. The acid action action seems to be "spent" immediately on contact
with the concrete . . .brooming around the "spent" acid gave no etching
action. Good results were achieved when I began applying the acid with a
humongous plastic sprinkler can from the garden . . .this allowed "fresh"
acid to hit every square inch evenly. Your results may vary . . .
>Awhile ago there was a lengthy discussion about painting garage floors, the
>essence of which, endorsed the epoxy 2-part paint as the only way to go.
>Well, I've etched the floor in preparation for the 2-part paint but now
>a gray haze, which won't blow off with the pressure washer. After two
>washings I end up with stripes of different shades of gray.
>The haze seems to be part of the cement, not a powder. It appears to be a
>result of the chemical reaction of the acid and the cement.
>One person suggested a lighter (weaker) solution of muratic acid. Another
>said, "don't worry about it, just paint over it."
>Considering the potential for a botched job, I thought the collected
>knowledge of those who have been there and done that might be useful. So,
>fire away and please help keep me from ruining my new shop.