Does any one know how to Clean off these stains with out having to use a poultice? It's an exterior patio with many oak trees & others surrounding. They are not even finished with the installation.
The rain came and leaves fell leaving stains.
I tried cleaning one step with the runs on the side. No difference.
When it's dry the stains have a brown tint, when it's wet The stains are lighter like sealer with spilled running down the side.
We are planning on sealing it with 511 porous plus.
What are your thoughts?