Discoloration at main lugs

What say you? Regarding the gold & blackened discoloration.

Thanks in advance.



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.