You might consider a static charge as an issue. I can't say it will happen, but I do know how hot Magnesium burns if it should...
A cotton ball or two rubbed in vasoilene, and placed in a film vial is safe, and 1/2 cotton ball will burn about a minute. The cotton ball will help catch the mag shavings as you are peeling them, should you decide to try that.
Good luck, Ridge