Parkerizing

At left, rusty banjo hooks. At right, after derusting and Parkerizing.

 

Parkerizing embeds a tough layer of manganese or zinc phosphate that protects steel from rusting. It has been a standard finish for tools and military small arms for nearly a century.

 

If you're careful with surface preparation and processing temperature, it's easy to apply a finish that's nearly as protective and durable as nickel plating.

 

All you need is a cooking thermometer and an acid-proof double boiler. Don't try it in a metal pot! :)

 

I did this with Lauer Parkerizing solution which is toxic and corrosive. Homemade Parkerizing is dangerous. Be careful, read up on the subject, and follow directions precisely if you decide to try it.

 

 

Done