I've just spoken with R&S Plating (where Colin used to work out of) and also Manchester Airguns who both said Colin is working elsewhere and has finished with the bluing
I've not managed to get in contact with Colin himself.
I hope someone can tell me otherwise?
Cheers
Greg
Let me know if you find anyone, as I too have some parts that I would like a price for.
Cheshire gun room has a blueing service but I have no experience of it. If I get time, I'll enquire further