Hi,
Doing a bit of maintenance work on the rear caliper. The rear caliper has clearly not seen a good clean in a while and has a fair amount of corrosion. Even the retaining pins were a huge task to remove, one piston was sticking which I've managed to free up with lots of cleaning and greasing. A question I do have is how do I remove the corrosion on the inner part of the pistons, Its most likely only surface rust but I'd rather remove it to stop it worsening.
Thanks!
