Paint the whole unit to look like the photo, but maybe a touch darker. When dry, give it a dry brush of the browns and greys, with the browns being mainly around the exhaust pipe itself, and the grey in the exhaust opening. The turbine blades would be darker, so a slightly darker shade of metallic grey, and then a wash or dry brush of a brown/tan colour, maybe with a hint of pink. Should sort it.
And now, I'm off to scream in pain and lie down!