I was the one who ordered the painting job.
Here is the guy's website : http://www.turquet.net/
He is not a luthier. He's really specialised only in lacquer finish on wood (exceptional furnitures and instruments).
Really a good job.
It's a custom color : light sonic blue
I thnik it's a PU. The goal was to match Musicman specs.
Originaly, the bass was red and then a crazy canadian made it... green (and a ugly one). Painting job was absolutely necessary.
Regarding the bass itself, it's REALLY a good one. Great sound IMHO.