Of course the earliest ones were made out of bamboo. Color case hardening is getting very popular. Pin Na Doske Ruger Lc9 Magazine Loader Rae-702 Connecticut shotgun sells a case coloring kit. Color case hardening kit . 30 long for handling ease and safety. This kit will intensify the beauty of. Replicates case coloring finish without risk or expensive traditional case color hardening. Afterwards, the parts were removed from the furnace and quenched. Wyoming armory is a custom gunsmithing shop where we build custom firearms, but one of our specialities is tradional bone charcoal color case hardening. We use the traditional wood and bone charcoal method of color case hardening. This is the only gel patina in this 'build your own kit' that is not optional. These days color case hardening is primarily done for aesthetic reasons. And, any size you choose is15% off! It's essentially cold bluing diluted down. One bottle of multi color iridescent, ...