Looking in Nissan E-Fast catalog, I can see that the Air Pump can be taken apart, much like a power steering pump can be. But how much of it is available for refurbishing? As far as restoring the look of this item, There are about 3 or 4 pieces on the unit that are cast into the housings that are supposed to be plated. If I were to plate the pieces that these small items are attached to, and then spray them with "cast iron" look spray or even blast the plating off the areas that are to be raw metal, would that cause any issue for the operation of said unit? Or does anyone offer NOS or refurbed units with this already done? I can only find a refurbed one right now, but it doesn't seem to have the proper plating. (01/70 240z)