Wow...oils? The figures are incredibly well proportioned... 
Mike Demana
Yes, all the major work was done using Oil Paints, I used my airbrush to base coat them in a light green (Amazon Green from Molotov to be precise) and then set about the oil work, I fin when you want lots of blending and/or colour transitions, oils are wonderful, on these models for example, I placed several small dots of paint to an area and then used a soft brush to blend them together. Its a very relaxing process!
And yes, the ladies do have their proportions in good order!