What is the paint used on the caliper/carrier? Looks like the carrier has paint on the surface the pads are on. Is that right? Did you use any (ceramic brake) grease on the pins?
The calipers have been powder coated and any mating surfaces masked/cleaned off. I've not used grease on the pins as the workshop manual didn't call for it. Would you/do you normally grease your caliper pins?
New disc and refurbished calipers all round on my 924S, shiny!