Gotta try this:) / Acrylic paint (enamel works even better, but it's more expensive) on a few smooth rocks, then placed here and there in my garden, makes a surprise treat for the eyes. I make sure to use non-toxic paints, 'cause my garden toad lives out there.
How to clean that nasty stove vent filter!
Another Pinner stated "The ONLY stain remover that actually worked on a seriously set in stain! I am never buying oxyclean again"