Want a truly unique coin? This blacked out coinnwith scratch, rub and wear depending how and what you carry with it.

Or if you just want to reveal the design in your own way, grab some steel wool, scotchbright, a buffer or whatever and give it a rub. 

Heads - Kingsford Knives / Tails - Spartan.

Solid brass challenge coin.  

3mm thick x 40mm round, laser engraved brass coin. 

These are raw brass and will patina/tarnish. I recommend a rub with 0000 steel wool to bring the shine back and a coat of sealer if you want to keep it shiny.