[StephenLawson]

Originally Posted by Sreiko

Thank you Tom I will see again about the detail you have mentioned.

Taz- if this is castrol oil, why it look the same as the wings leading edge [I have intentionaly put arrows to note this] and why is this light color and not the very dark as the area covered with dark green paint?

Cheers

Sreiko some of the concern lay in the lighting of the image you are using here. The plywood Axle wing was overpainted solid green and the dripping oil from the engine cylinder heads (when then the motor was off) soaked into the surface and causing most of this effect.

In flight the propllor wash threw the excess raw dripping back along the surface. While the burn oil exhaust added to the patina.