I picked up the engine from soda blast the other day and was pleased with the results:
After cleaning, degreasing and masking I hit it with primer:
Then colour:
I used VHT primer and paint. The main silver is an aluminium silver and the barrels are satin black.
I am really pleased with the results.
If I did it again I would consider brush painting the barrels as the fins are a pain. I would also consider sanding some of the cast flash marks on the cases back as they really show up.