Gunmetal blue eyes is not a product, but rather a description of a color. However, there are some search results related to products and ingredients that contain the words "gunmetal" and "blue eyes". Here is a summary of the relevant information:
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NYX PROFESSIONAL MAKEUP Epic Wear Metallic Liquid Liner, Long-Lasting Waterproof Eyeliner - Gun Metal Blue Eyes: This is a liquid eyeliner that comes in the color "gun metal blue eyes". The ingredients include cyclopentasiloxane, synthetic beeswax, and microcrystalline wax. Customers have mixed opinions about the smudge resistance of this eyeliner.
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NYX PROFESSIONAL MAKEUP Liquid Crystal Liner, Crystal Gunmetal: This is a liquid eyeliner that comes in the color "crystal gunmetal". The ingredients include water, triethanolamine, glycerin, acrylates copolymer, propylene glycol, polyvinyl alcohol, carbomer, ethylparaben, methylparaben, and propylparaben.
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Bluing (steel): Bluing is a passivation process used on steel to protect it against rust using a black oxide coating. Cold bluing is generally a selenium dioxide based compound that colors steel black or dark grey. Rust bluing was developed between hot and cold bluing processes, and was originally used by gunsmiths in the 19th century to blue firearms prior to the development of hot bluing processes. The process was to coat the gun parts in an acid solution, let the parts rust uniformly, then immerse the parts in boiling water to convert the red oxide Fe2O3 to black oxide Fe3O. Often it does provide an adequate cosmetic touch-up of a guns finish when applied and additionally oiled on a regular basis).
Gunmetal blue eyes is not a product, so there are no specific ingredients or materials associated with it.
