Zinc Electroplating (rack): Clear, Black, or Yellow Iridescent finish
SPEC: ASTM-B-633, QQ-Z-325, Mil-T-12879

Zinc Phosphate Coating (barrel): Dry to Touch Oil Finish
SPEC: MIL-DTL-16232 Type Z

Black Oxidizing (rack or bucket): Black Oiled Finish
SPEC: Mil-C-13924

Electro Polishing Stainless Steel
SPEC EP 1019

Passivating Stainless Steel

Aluminum Anodizing (rack): Red, Blue, Green, Purple, Black, Gold/Yellow, Gray, Clear are the most common finishes.
If you send a sample of the color, we will do our best to match it.
SPEC: Mil-A-8625 Type II, BAC-5022, AMS 2471, AMS 2472

Aluminum Conversion or Irradiating (rack): Yellow -Clear or Gray for  trivalent chrome.
SPEC:Mil-C-5541/Class 1A/Class 3, ASTM B449-9

Pickle & Oil of hot-rolled steel