Firearm Refinishing

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General Firearm Refinishing

Investment Grade Firearms offers two main finish options, Envirotech and Manganese Phosphate.



is a pigmented bonded resin coating.  It is a very corrosion resistant finish, and will not rust from fingerprints or moisture.  It can be applied to any metal, but do to the heat required to cure the finish it cannot be applied to plastics.

I worked for two years with an Engineered Coatings firm to develop this finish.   It is very similar to the Heckler and Koch Harsh Environment finish found on many of the Hk weapons such as the Hk91, Hk94, Hk93, MP5, and USP

pistols.  It has a satin smooth matte texture that is non-reflective.  Envirotech also has Teflon and polymer properties which reduces friction between moving parts.

The Envirotech Refinishing process involves removing the existing finish,  Parkerizing with Manganese Phosphate, and then the Envirotech is applied over the Parkerized finish.


  • All parts are going to match perfectly.  As opposed to a Parkerized finish which is going to be lighter on some pieces and darker on others due to the different characteristics of each metal.
  • Very rust and corrosion resistant.
  • Reduces friction and improves functioning.
  • Perfect match for factory HK black finishes.
  • Low maintenance.
  • Can be applied to all metals

Dark Gray Manganese Phosphate (Parkerizing)

Same durable, economical finish that’s protected U.S. military firearms for decades.

  • Tough, Rust-Resisting Finish
  • Meets Mil Spec STD171
  • An ideal choice for hard-working handguns, rifles and shotguns.
  • The coating’s porous structure lets it soak up oil to help prevent rust.
  • The color will vary from light to dark gray, depending on the base metal’s alloy and hardness


These prices apply to most firearms, send an email for an exact quote

Shotgun or Rifle Envirotech Refinish


Shotgun or Rifle Manganese Phosphate Parkerizing


Handgun Envirotech Refinish


Handgun Manganese Phosphate Parkerizing


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