Metal

Since I have these metal sheets, I thought I would try it out. I embossed the metal. On the embossed side I just tried pouncing the colors. I watched a video that did this and of course hers came out really neat. Mine did not, LOL
So on the Debossed side, I tried just dropping drops of ink and moving the metal around to spread it. This might work if you had tons of time to make sure it came out right. And when you put BF on it, it made the outlines which I don't like.
I may still play with these to see what if I can get something I like.