Ink stains can be removed using paint thinner. Ink stains can be tough to remove, but paint thinner may be the answer. It is critical to determine the type of ink stain and chemical being used, as well as the surface to be treated, before application. Acetone removes certain types of ink from paper. But you should test a small area first to make sure an acetone wipe won't cause other problems with your paper. If it does, try another material. Alcohol wipes contain ethyl alcohol and are effective at removing some inks from paper. They should not be used on documents that contain confidential information because they could destroy or damage them. Soap and water will wash out most inks, but it may take several attempts depending on the intensity of the stain. Use a gentle hand soap, such as dishwashing liquid, and rinse thoroughly after washing the car. Letting the car air-dry after washing will help prevent any further staining of the vehicle. If the ink is digital, there are various programs available online that can remove digital ink stains from fabrics. First, download a program that is designed to remove ink stains from fabric. Then, follow the instructions provided by the software company. Some require only water while others call for special chemicals or heat.