Birchwood Casey Case Colouring Finishing Kit

Specially formulated to create a case coloured effect without the problems and expense of traditional case-colour hardening.
Works great on receivers, trigger guards, small parts or any metal that users would like to see with a case-hardened colour scheme. It applies easily just like other Birchwood Casey cold blue products. Perma-Colour works well on steel, but is not for brass, bronze, zinc or aluminium.
Replicates a case coloured finish without the expense or risk of traditional colour case hardening. Easy application on steel. Great for receivers, small parts, and firearm barrels.