I tested degree two ways. The first way was spraying it on and immediately putting on my tshirt. No marks! Very impressed. I also tried it as if I forgot to put on my deo. Just lifted the shirt and sprayed. No marks.
I used Bic mechanical pencils when I was in schools. Now my kids do. I can't by the regular pencils you sharpen. Bic pencils have the strongest lead and last the longest. But a ton of these every year.