>> You must etch the concrete. You can get muratic acid from
>> pool supply stores. Mine carried a box of 4 one gallon bottles for
>> $10 plus a $5 bottle core charge.
>>
>> I poured the acid on the concrete, mixed with water from a hose, and
>> scrubbed in with a push broom. Bad for your breathing and eyes so
>> wear respirator and eye protection.
>>
>> Clean with water, then with a baking soda/water mix (I used about
>> 4 pounds baking soda to 4 gallons water) as an acid neutralizer.
>> Then rinse again with water.
You can get muriatic acid at any home supply store too - about the same $$.
One thing to beware of is that muriatic acid fumes will rust any exposed iron
surface - virtually instantly. Be sure to physically cover (wax, etc., isn't
enough) all tool surfaces before etching, or better yet, get them out of the
shop entirely.
Cheers!
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