I did, and I regret it.
I thought I would put a little bit of silver on the guide of my printer so I could see better where to put the cd cartrige in. It was black on black.
So I shook the pen and pulled the top off.
Unfortunately the entire top came off as I was leaned over the printer.
This is the aftermath.
At least none got inside the printer, it just looks hellish. And it is never coming out of the carpet.