Here's the used oil pan... It has the oil return tube already welded in for turbo setup.
after grinding it with a wire wheel on a drill:
I thought about sandblasting, but there would be no way to know for sure if any sand was left inside of the baffles in the bottom of the pan.
Next I sprayed it with Self Etching Primer, excellent for bonding to bare metal.
3 light coats
Then I had some Black Engine enamel, 1200?F High heat. The regular 500?F would have worked fine but I didn't have any there.