What has this bass been trough?

What has this bass been trough?

Hi everyone
Today I bought this Stingray 4 HH (2007 i think), and it plays like a dream, real resonant and very comfortable. Meeting up with the seller I expected a bass in dire need of a deep clensing, a lot of belt buckle rash and generally poor shape.
What I got instead was a mystery.
The neck might look dirty, but it’s not dirty at all, instead it is discolored in a uniform way (see the light part by the neck pocket), and it feels clean and well maintained.
What I thought was belt buckle rash is instead some kind of paint lift, as if there was something evaporationg from under the paint…
And the pole pieces? Almost stealth black.
All hardware is tarnished, as are the locks on the (original) case.
I have no eda what this bass has been through, and I am not sure I want to change it at all as it looks awesome, but if anyone has any theories on what might have caused the bass to look like it does today I am very interested.
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