I would like to know as well, so I am posting in.
Alex, do you have an extra shirt and sharpie to see how it does?
Without knowing the answer to your particular question, doesn't it always seem like a Sharpie can do anything? I think of those things as invincible. This of course, isn't a post in response to your question, just me sharing my love of Sharpies. I would very much like to know the actual answer to this as I could see great applications for this.
Have a nice night. Oh, I see this is your second post, in that case: Welcome to the forum.
