Parkerize Solution

Zinc Phosphate concentrate. There are many types of parkerize solution, most of which are used as a surface treatment before painting. This is the one for firearms. Surface finishes from medium gray to almost black can be achieved, depending on immersion time and surface preparation. 8 oz bottle of concentrate makes over 7 quarts of solution. This is enough to do several guns. A parkerized finish is durable, nonreflective, and much easier to apply than hot blue.