Silicone/Urethane Moulding

Hey guys, I'm wanting to make a superman returns style cheat emblem. I've made it in clay/bondo but do I have to make a silicone mould of this then use it to pour in urethane? Can anyone advise on making this opaque and coloured like the superman returns chest piece?

Many thanks guys,
Andrew

P.S. Even short small answers appreciated!!!!

There isn't much for Silicone to tint or pigment them in the process. You can paint silicone however:

Lifecasting, Mold Making, Molding Materials, and Casting Materials from EnvironMolds

I meant tinting the urethane as presumably silicone will be used to make th negative mould yes?

SO-Strong® Color Tints

SO-Strong® Color Tints for Urethane Rubber, Plastic and Foam