Polyurethane's soft texture absorbs colour transfer easily. It's commonly used as imitation leather in watchbands, wallets, belts, faux suede and handbags -- in addition to covering furniture from sofas to bean bag chairs. Dye from clothing, leather or any item that isn't colour-fast can transfer to the polyurethane, leaving a stain. The challenge of removing a stain from polyurethane lies in removing the colour transfer without damaging the material. Prompt action and the right supplies increase your chances of completely removing a colour transfer stain out of polyurethane.
Apply liquid detergent on the colour transfer stain. Leave it on for 20 minutes. Rub the polyurethane gently with a rag or microfibre cloth to help remove the stain.
Reapply the soap or detergent if any of the stain remains. Leave it on for at least 20 minutes and then use warm water on a clean rag to clean the stained area.
Make a paste of equal parts of baking soda and water, if the stain has penetrated the polyurethane and isn't coming out fully with the soap treatment. Test the baking soda on an unobtrusive area. The slight abrasive quality of baking soda can help remove the stain, but may leave the finish looking dull.
Keep polyurethane away from direct contact with new fabrics and leather items to avoid the risk of colour transfer. For example, new sweat shirts, jeans, and certain fabrics that aren't colour-fast can transfer dye, even when they're dry. Moisture and perspiration can increase the risk of colour transfer stains. Polyurethane generally has a fabric backing or other material as support. Unlike vinyl, it has a soft, porous surface. Rinse soap off thoroughly and blot gently with a clean rag or lint-free cloth such as microfibre to remove excess moisture. Rough rubbing can damage the material's surface.
Don't use bleach on polyurethane. It isn't safe to use bleach on certain materials. Don't use detergents that contain bleach on polyurethane. Using chemical stain removers could damage the material and may be unsafe to breathe. Test detergent and any other cleaning agents on an unobtrusive area of the garment or object to check the effect. Some dye stains won't come out.