New Offenhauser intake!

Ulf, I worked for McDonnell Douglas/Boeing for 33 years as a Materials and Process Engineer. We had various media blast cabinets in our lab. One of them was called Hydra-Hone. It used water as the carrying medium for any type of abrasive media that we chose to use. Many times I would use just the water on our aluminum parts and they turned out just like your intake. Excellent results.