The Honda OEM rear discs do seem to rust excessively, my wifes MK2 had 2 sets in 4 years that just basically rusted away, I then fitted Eicher discs and Brembo pads from Eurocarparts for less than half the price of genuine Honda and they have been absolutely fine ever since... The rear slide pins and pad 'ears' are more likely to stick on rear brakes and cause problems due to the fact that the rear brakes cop a lot more crap than fronts ( some car makers still fit drums to rear because they are plenty powerful enough and basically maintenance free except maybe new shoes every 100,000 miles or so - and drums themselves last for ever, the other good thing about rear drums as a handbrake is the 'self-servo' effect of drum shoes, where once they contact the drum they tend to lever themselves into the drum harder as the drum tries to rotate ).
