Last year l layed a layer of brick pavers on top of an old concrete patio. I used standard masonry mortar. Now the bricks have this gray haze on them that I can't seem to clean off. The bricks look fine when wet, but as soon as they dry off, the haze comes back. I've tried muriatic acid (various concentrations) and acetone, but nothing seems to work. Any suggestions would be appreciated. Thanks.
- posted
20 years ago