SundanceUK

One way of getting a single pin out is by removing the caliper from the car, taking out the four cap screw bolts that hold it together and twist the two halves away from each other. This cracks the bind on the pin and allows you to remove one half of the caliper from it. The pin will simply knock out from the other half of the caliper.
I find splitting the two halves useful as you can remove the steel slider plates and remove the build up of corrosion under them which lifts the plate and allows debris in. New stainless slider wear plates are cheap to buy. Stripping the caliper also allows a chance to clean and paint it so its all nice and good again!

Sundance