In photoshop, I used a gray paint brush to paint over my pencil drawing, giving it a smoother, more sleek appearance. After that, I added a gradient over the top of it and painted on some "static-ey" lines.
I added a few more lines, and some more brush strokes to smooth out the appearance. I also added some text as well!
Once finished, I send the image off to get screen printed on a T-shirt so I can wear my art like a badass!