Last month I cleaned some cushions for a customer which were very bad (from a home with mentally disabled children), the customer wanted them to look like new again so I told her that I could clean them and redye (pigmanted leather) and make them like new. After cleaning with a standard sponge they looked okay to good but then I started with the Solution sponge and the difference made was outstanding, only 1 cushion need dye repair as that had servere damage to the piping.
Shaun