Can plain concrete be given an acid-stain finish after curing?

Yes, genuinely a common way to add colour to an already-cured plain slab — acid staining creates a mottled, variegated colour effect by reacting chemically with the concrete’s surface, different to integral colour mixed in before pouring.

The final look is genuinely more variable and organic than integral colour, worth seeing samples of this specific technique before committing.

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