In small areas, use the heal or patch tool (depending on your photo editing software) to select areas you want to fix and clone. I have found using the tool in smaller areas produce less patchy results:
Original Image – No Edits
Stray hair removed
If you’re interested, you can see the final result with saturation turned up and surface cleaned up here: http://galleries.soft-graphix.com/colored-cubes
soft-graphix.com blog 