Unusual Stains on Granite Steps

Hello all… I need your help! We have a commercial customer who needs us to remove the unusual looking stains on the granite steps. Any thoughts on what they are and the best solution to remove them?

Just looks like mud seeping out to me. A lot of rain this year. What have you tried? A lot of it may just come off with some pressure. But good chance just going to look the same in a few months

OneRestore works with a lot of different stone surfaces. I like it myself.

@Racer mud seeping out makes total sense. We haven’t started the project yet but plan on treating the white residue with Eaco Chem calcite remover, cleaning surface and then fill all the joints with a water proof joint sealant to hopefully prevent the mud from seeping out again. Thanks!

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Don’t seal anything. Your just cleaning it. Draw the line somewhere.