Well personally I would leave it alone but no one should be denied for making it pretty!
You have a lot of stuff, I'm guessing you have some moola. Since it's the "Art" series I would first strip the paint off of the amp, prime it, paint the heatsink black or white then have someone hand-paint a famous art piece(has to be long and narrow like the Last Supper or something) in the middle strip. The name PPI and model number shall be hidden somewhere in the painting. Clearcoat the paintjob then hang it in that closet of yours like a framed painting.