Anodizing:

Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.

Hard / Color anodizing (0.00007″ to 0.001″) specifically for the automotive racing/performance industry is for protecting, hardening and coloring and is completed in 6 steps:

Kit — specify size and application

Piston Racks – 1/4″ top 3/16 tray

Option:
– short-caps in tray for diver
– tall with caps on rods

also bottom tray is angled and has feet to locate on block