I use them as disposable towels too. They won’t touch my paint or interior because they lint so bad, even after being washed a few times. If gentle you can get away with using them without marring on SOME paint, but if you think they are safe on all paint you've got another thing coming. These things will put tiny scratches in my black Nissan paint no matter how gently I use them. If you are just caring for your own car, and you know they won't mar, that’s fine, but when you are working on a different car every day, you might as well spend the extra money and get a quality towel that you know won't mar or lint.