Technical & Reference Section > Tech and Restoration

Hard anno? ... or not! as the case may be :-)

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ED209:

--- Quote from: BrianP on January 25, 2017, 12:35 PM ---Are these Primo Excel cranks Ed?
Might be more like a black electro plate finish, as I remember these had the Primo logo etched into the arms?

Brian  :daumenhoch:

--- End quote ---

Thats the badgers Brian :-)

Pics below ... it seems to be a finish over chrome?

Spen69:
No chance Ed, that will need reverse chroming to remove it mate. I think it's a colour added at the chroming stage not put in the lacquer finish afterwards  :-\

oldtired:
spen may be right,  looks like a chemical process,     ed if you've got one, try a brass wire brush in a drill on the pedal boss in the pic, where it's damaged ,if it brings the black off , then i can get em shiny for ya ,by cutting em back with polish,    those directors Lman had off me had only been prepped ready to shine up ,  first cut, provided the chemical finish is on the surface of the chrome then they will polish up ,   tbh it looks surface applied , on top of a basic chrome, or possibly nickle plate  :-\

ED209:
its deffo a finish over the chrome as they have worn in 3 layers ... the black has worn to show the chrome .. then the chrome has worn to show the bare metal.

They must have been ridden well to wear through the black finish, then chrome ... down to bare metal.

I kind of like that so I might just leave 'em :-)

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