I have been trying to remove white stains on brick (either from new stucco installation or runoff from old painted aluminum siding) on a new house one of my customers just purchased.
I attempted to remove it with the following method(s).
1. 4000 PSI cold water pressure washer and the following chemicals:
1. Butyl based house wash
2. Muratic Acid
3. Oxalic Acid
None of the above chemicals were able to remove the stains.
Any suggestions would be appreciated!