223200cookie-checkwhite bore stains on brick wallsno
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Anonymous
If anything will work, hydrochloric acid, about 1 part in 3. It will remove any carbonates, but not any sulphates (which may be efflorescence from the bricks themselves). Put it in a generic garden sprayer and spray on. It will eventually destroy the trigger mechanism in the sprayer but will last long enough to do the job
If anything will work, hydrochloric acid, about 1 part in 3. It will remove any carbonates, but not any sulphates (which may be efflorescence from the bricks themselves). Put it in a generic garden sprayer and spray on. It will eventually destroy the trigger mechanism in the sprayer but will last long enough to do the job