Unplated Raw Pickup Covers…part 1 – Philadelphia Luthier Tools & Supplies

I found out how to fake it but how does this occur naturally?
So true.....but you are forgetting about a little thing called Elfin Magic!If you watch slo mo video, you will find the strings bend/oscillate far more than you would ever think.
The strings won't be in the same position in relatiton to the lighting all the time.Does indoor lighting cause fading, the same way the sun does?
The parts covered by the strings will not fade. And will be darker.
Ya. Darn Sun"Magneto helio oxidation".
Is this the same thing?
Magnetic fields selectively blocking solar ionization. See if they get worse after solar flares - or correspond to the auroras.