Yup, we had a good plater in Ontario, Platingmaster..
Mine was done in 77 I think, just showed a bit of wear this year.. sat out side under the roof overhand for a year and a half prior to that.. And I was running it in Nov and Dec a few seasons, and they put chemicals on the roads here for de-icing that some say are corrosive.. not sure though.
I like an all silver engine with chrome, looks so bright when it is clean.. and I smoothed off my valvecover.. no lines and no wrong engine size on it...( I can remember what it is..lol)
A buddy here has chrome cases, he got them done probably around 81, held up pretty good.they have the odd dull spot..chrome does not throw well into cavities sometimes..
I'd be soiling myself with worry if I got cases done (unless it was Brown,s or someone like them), if there was any problems it would be a huge PITA...