[pegasus]

Dilute some dark brown paint (really dark, not chocolate) and give him a wash. It will break down the mr-clean look and help define the features.

Really dirtying him up in the sense of 'adding dirt\mud' requires some careful and selective dry-brushing and is much more difficult. It's very easy to end up with something that looks like he's been standing too close to an exploding can of khaki paint.

Excellent first sculpt, by the way!