Quote:
Originally Posted by peetee
Don’t waste your time and money with stain removers. Use propane torch
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Just tried a gas torch, no effect at all. Maybe too week as its a soldering torch.
Quote:
Originally Posted by dave550i
How about trying Brick cleaner? needs handling with care as quite a strong acid, maybe worth a try
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Brick cleaner has a hydrochloric acid as an active ingredient, while it does good job removing mortar residue it does nothing to oils.