Accepted Answer

Since the stain is new it's going to be difficult to remove due to it soaking into the concrete, especially because you did the right thing and etched it. At this point you may want to consider re-etching it and going back over it with a complimenting color with a faux technique to give you the blotchy look. You may not be able to remove the stain, but you can introduce new stain over the top to give you your non-uniform appearance. This would probably be the easiest solution. If you truly want to remove the stain here are a few products that might do the trick:

Methylene Chloride: A good Epoxy emulsifier. Effective in removing new sealers. If using this product, you must wash the floor thoroughly before acid staining.
Citrus Peel: Manufactured by Dayton Superior Chemical Division- heavy duty concrete stripper and degreaser. (Flammable) 1-800-745-3707

Please let me know if I can clarify more for you!

Expert:	Dan Peskorse
Pos. Feedback:	100.0 %
Accepts:
Answered:	6/18/2008

General C&ontractor

Owner/Partner - Historical Rehabilitation and Restoration Firm, 10 years professional experience, GC