Looking good. I really like the reptilian skin on the arms and hands. Overall skin color is nice too.
I think a tattoo or body paint might be interesting, but it would definitely need either a clean design or some other color for contrast. Maybe use a snake pattern or possibly some body paint texture to make it stand out a bit more.
First you use "MakeMaterial #" (where # is a number... 20 for example) and it makes that many materials.
Then, you select groups of faces and apply a different material to each group. Once you've done that, run uvLayout and it will planar map each group of faces for youto put together. Still takes a while, but perhaps not quite as long as normal