Turn your jeans inside out and wash them in cold water on a mild washing machine cycle. You may also hand-wash them. In the bath, jeans color easily and can become faded or stained more quickly than other clothes. So if you plan to wash your painted jeans in the bath, only do so for a short time (no longer than 10 minutes) and use non-toxic cleaners. It is best not to put paint or any other chemicals into your washing machine. This is because they will come out colored rather than white like normal clothes. However, some paints such as acrylics may be able to go in the spin cycle. If you want to get rid of the paint smell from your sprayed-on jeans, try adding one cup of baking soda to a hot shower. Soak your jeans in the mixture for at least 30 minutes and then rinse them thoroughly before putting them in the washer or dryer.