- Pro Solutionist No Stain removes hair color stains on client's hairline, ears, and scalp. Fast, easy and effective with hair coloring products. This formula leaves no residual film. To use: Immediately following completion of color application, gently rub stained areas with cotton moistened with NoStain. If scalp is stained after color has been processed and rinsed, apply no Stain with cotton and blot gently. Rinse areas after applying.