Mike Giant started life as Tattoo artist.
These days he is one of the big players in the 'low brow' art scene- his canvases selling for big bucks.
In an interview i read with him some time back he told how each of his original works are made without any pre sketching/ rubbing out/ Liquid paper touch ups etc. I suppose you can't make mistakes on skin so his experience as a Tattoo artist clearly comes in handy!
Here is some of his work.