When I bought my Solstice (Sly gray) the calipers were painted blue. I asked the seller about them and he told me he was planning on a blue rookie stripe as well. Lucky that I bought it when I did. The calipers were fairly easy to return to stock colors but the stripe may have called for a re-paint.
When I bought the G8, the first thing I did was clean up the brakes, re-paint the backing plates to remove rust, clean up and re-paint the rust on the rotor hubs and generally freshen everything up in the wheel wells. Don't need flashy colors to make them look good, clean and fresh speaks for itself.
VietNam vet, Pontiac lover
1969 Firebird 350, Carousel red t-5
2009 G8, Switchblade Silver V6
2008 Solstice GXP, Sly manual
2008 Grand Prix, Ink Slate