Caustic etching is an immersion process that is used for cleaning and removing oxides which provides a consistent, uniform matte finish. The finish is commonly used for deburring, and preparing parts for paint, powder, anodizing, chromating and other metal finishes.
Acid etching is a mild form of cleaning aluminum. The acid etching process JMD follows does not remove material which makes it a great candidate for machined parts with tight tolerance holes. This finish will not dull the material but will remove oxidation from the surface of aluminum.