Mine were seized in when it came to pad replacement time. I drilled the back of the caliper with a small drill bit (ie about half the diameter of the pins) and knocked the pins out with a 2mm diameter panel pin. Seemed to work OK, and there's still plenty of meat at the bottom of the pin location holes for them to seat against.
I guess the problem is that these holes may allow dirt, salt etc into the back of the pins, making them seize worse next time. I filled the holes with copper grease to help prevent this. Will see how effective that is at next pad change.
If that don't work then, as Northwind says, I think you're splitting the caliper.
The folks with more expertise than I might know of a better way to do it though.
Cheers Keith
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