Black Oxide (Bluing) The traditional finish for firearms is bluing, more technically known as black oxide. This method protects from rusting, as well as reducing glare off of the metal. It is achieved through an electromechanical reaction, transforming the surface of the metal to magnetite, an iron ore.

Anyway, I noticed some bad scuff marks on the freezer (see pics) and realized the freezer has an adhesive clear "tape" (see photos). It is NOT the clear plastic coating normally wrapped around SS or appliance glass. In order for the scuffs to be removed, the film has to be removed since the scuffs are in the plastic and not the steel.
Method 2: Copper Penny and Penetrating Oil. Closely examine your gun to find specific areas of rust. Spray a cleaning and degreasing lubricant on those spots. Let it sit for a half-hour or more. Use a penny to gently scrape the rust off the surface. Wipe off the areas using a clean cotton rag or microfiber cloth.
Pressure wash it. Soak in a full sink of hot water with 1/2 cap of bleach for around 4 hours then scrub with steel wool. Soak it in acetone (nail polish remover) and it usually will wipe off. I wrap mine in paper towels and then splash it on so it keeps it on the cup and then wrap foil around it to sit for a while. 3,469 satisfied customers. I have a French door top, freezer bottom, dark stainless. I have a French door top, freezer bottom, dark stainless steel model. Purchased in 2/2018. The french door on the right at the base is peeling. A … read more.
3. Black Polyvinyl Chloride (PVC) Protective Film. This stainless steel protection film is appropriate for heavy roll forming and other applications requiring heavy surface protection. It is a polyvinyl chloride (PVC) film, with an acrylic adhesive layer, and a very high level of adhesion. The film is nominally 120 micrometres thick, and black
How to Remove Protective Film from Stainless Steel Surface. Removing protective film from stainless steel is a simple process that can be done with some basic household items in the following steps. Look for the edge of the protective film. This edge is usually aligned with the edge on the front of the appliance. The edge may also have a tab jcEOjaJ.
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    • how to remove old protective film from stainless steel