So I decided to use one of the Color Blanks I bought a while ago and try to make a Cyberman. I decided to start off coating the figure with the silver/gray pen. As you can see the markers that came with the vinyl blanks suck.
Worried that the markers completely wouldn't work, I tried to see if I could get the eyes visible over the crapy gray coating. It was sort of a success.
And BAM! Final, product. I'm really disappointed by the markers that came with the box. I think I'll have to move on to either Sharpies or acrylic paint pens. I heard those are supposed to be good for custom designing vinyl.