Reference of Nugget's scars.
Sort of a rough ref but I think you get the idea.
Yes, I did get lazy for the back side but... eh.

So the red scars are burn scars from an explosion.
The pink scars are from his black smiting work.
The blue scars(the little dots) are from needles from the days he had a Zydrate addiction.

The silver/gold parts are his mechanical body parts, that can be seen better here: http://www.furaffinity.net/view/11966942/

If you have any questions, feel free to ask.

Original meme here: http://www.deviantart.com/art/The-S.....Meme-150044919