Stain Removal Guide The following video guide is from the Marble Institute of America. It discusses a guidelines for stone care and cleaning including stain removal for stone with poultice:

As it was mentioned in the video, tough stains may require a Liquid Poultice for removal. The PDF below is from The National Training Center for Stone and Masonry Trades and outlines how to apply poultice to stains. Click here to download the step-by-step stain removal guide (PDF). Poultice Plus – Stain Removing Absorbent Powder from Miracle Sealants is available through Carved Stone Creations in 1 LB and 5 LB containers.