In years past these were available from the uniform man. Not only did he bring clean uniforms once a week, but he also brought clean shop towels and fender covers.

Now that you can buy red rags really cheap at the auto supply, I'm not sure if the uniform man still exchanges rags and fender covers as he did when I was a kid in my Dad's shop.

When I was a kid in my Dad's shop, he had plenty of these and would really read the riot act to any of his mechanics when they failed to use them. Customers don't have a sense of humor when you scratch their cars. They didn't use the rubber covers in those days (the fifties) because the cars had wide fenders and the "blanket" would stay in place and tools would stay in plase well on the padded fender.

Call your uniform rental company and ask them. I still have one that I bought from the uniform man over 30 years ago. It doesn't get filthy like shop rags, so I just throw it in the washer with my old work clothes from time to time.

Hope this helps,