Porous Plus can be difficult to remove if the excess has been allowed to dry on the surface. A solvent based stripper may be needed to strip off the residue, but I'd start with some Porous Plus first... it may re emulsify the original sealer and aid in removal. You may need to use something as strong as Methylene chloride... nasty stuff... not only will it remove sealers and coatings, but also the finish off cabinets and baseboards.... and can cause liver damage...
Thanks you for using our message board. Please let others know about this board so we can increase readership and get others to post questions and answers. Also remember, that this board exists through the sales of our DirtyGrout Marketing CD. Please help keep this board opporational by supporting these products. Manufacturers and Distributors are more than welcome to participate as long as there is no blatant advertising on the board.