Discolouration is becoming increasingly common with light-coloured top-grain leather. This usually affects car and furniture leather and is caused by dyes from clothing or belts rubbing off onto the surface of the upholstery. The resulting discolouration cannot always be removed using common commercially-available cleaners.
First try and remove the stains with ColourlockStrong Leather Cleaner. Also use the Leather Cleaning Brush. If this doesn’t solve the problem, then use the GLD Solvent.
Lightly damp a white cloth with GLD-Solvent and carefully clean the discolouration. Always test on a hidden area first. Because GLD-Solvent slightly dissolves the colour coating, take care not to remove too much. If too much colour is removed or visible stains remain, the areas can be re-coloured with Colourlock Leather Fresh Dye.
To avoid further discolouration, the leather should be regularly protected with Colourlock Leather Shield. Leather Shield is a good protection against discolouration. Only apply Leather Shield on clean leather.