Thanks for the info guys very informative and very interesting. Something to consider for a future venture maybe?
I think I might buy a couple of cheap razors where the blades are totally shot and have a go at removing the scales first following JJ's technique, just to get the idea and feel of how this part of the operation works!?!
Like you say mcgruff cleaning up and polishing metal is a stage by stage process. I wasn't sure if a diluted acid was involved on the blade cleaning and again can use the cheap blade of the razor used for scale removal project to play around with using various grit paper, wire wool and pastes!?!
Thanks hotmetal for those YT links of JJ, well worth watching!
Cheers Andy