I no there not made anymore but :O

[graham John]

i think the correct process is chemical blackening

not where i live it aint..............


cheeRS

[BigDave]

should do alright, but isnt anodising usually for Aluminium ?

Yep, my mistake. Its more of an oxidation process so wont work on steel. But you get the idea, its more chemical blacking as mentioned by Graham.

Cheers...