All of our work is guaranteed


Pentrate Metal Processing, Inc. has been a leader in the application of Black Oxide since 1942, and can apply Black Oxide to carbon steel, stainless steel, copper, brass and zinc die cast.

We work directly with prime government contractors, manufacturers, job shops, machine shops and tool & die shops.

Our customer include: Hughes, General Dynamics, Rocketdyne, GM, Ford and Chrysler.

Permits issued by US-EPA, CAL-EPA, LAPD, LAFD, US-ATF, SCAQM, CIty of LA- Bureau of Sanitation & the State Board of Equalization.

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