The big question would be when was the wiring done.

Not sure when them moved away from fabric covered wire, but it would have been a while. But aluminum wires enjoyed populatiry (and infamy) in the 70s and maybe 80s- if there was wiring done during that time, I'm not sure if they can use resistance or any sensory based methods to tell, but IMO it would be worth it bust to sheet rock and find out.

As for telling if insulation is warn, as far as I know not really able to tell except MAYBE thermal sensing.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.