My surname has changed recently, so I have an obsolete medical insurance card. And also a friend of mine played my guitar with such passion that he broke my last guitar pick :-D
I cut out the shape of the pick from the card. The first one that I cut out was too small, I was cutting it without drawing the shape first. Now I draw every piece.
The red one is already finished, the blue one is just cut out.
I took my fish knife and with the blade perpendicular to the card, I scrathed both sides of the pick. Then I went on at the sharp edge to make it smooth.