The Birchwood Casey Case Colouring Finishing Kit is specially formulated to create a case coloured effect without the problems and expense of traditional case-colour hardening. The Perma Colour Metal Finish Kit 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 recievers, small parts and firearm barrels
