vrs new discs and pads at 40k?

the rear disc will rust over even if it's just from rain.

Mine is a weekend car only it sits still for 4-5 days without moving so de-rusting the brakes is a regular thing.

My fronts are fine but the rear are showing sides of rusting at the end of the disc, not sure if it's enough yet to warrent a replacement.

Just over 2 years old and with 40k on the clock, 40K service to be done asap

My paxo would eat a set of pads within 12k, where as the fabbie had little wear at 28k