Discoloration at main lugs

What say you? Regarding the gold & blackened discoloration.

Thanks in advance.

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Anyone?

Panel interior has Discoloration and considerable Dust/stone recommend service /Repair? by an electrician .

Is there double taps on Neutrals Not visible in this picture if yes they too need repairs

Measure temp with pyrometer. Anyone who has one…
Need to know if this is a past or present condition.