Quote:
Originally Posted by XC90Mk1
All interesting to read and I don’t know the answer.
Aluminium anodised pre 1980 would have been the absolute F1/NASA type technology. Are you sure?
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https://en.wikipedia.org/wiki/Anodizing
https://dorsetaluminium.com/
Why do you say anodising before 1980 would be F1 or NASA technology? It's been around for nearly 100 years and specialist anodising companies have been in existence for many decades, as you will see if you read the history of DAP (Dorset Aluminium) above.
It's a much more common process than you might think and i'm willing to say with some certainty you have anodised aluminium products in your house without even realising it.