/cgl/ - Cosplay & EGL

So I'm needing some help on Command Seals.
I have two options already planned:

A. Acrylic Paint
Pros- Easy to put on, easy to get off, and the color works well.
Cons-Too easy to come off. I can't get any water on it or have anything touching it, which just seems gross to me during a con.

B. Temporary Tattoo
Pros-Easy to use and longer lasting
Cons-I only have 1, and I need it for 2 days. They're slightly better than Acrylic paint, but not by that much. Also, I have smaller hands, so it's a bit bigger than it needs to be.

I'm wondering if anyone has any better options that'd work out for me? It'd have to be something that I could grab locally in the next couple of days.