I just did mine a couple weeks ago. What should have been about an hour job, took several hours and was a PITA! I used a lot of PB Blaster. Make sure you hit the pins a couple times after spraying them, the vibration seems to help work the penetrating spray in. I used a punch and I was careful not to 'mushroom' the end of the pin. It seemed to help to hit the pins from both sides. Once the pin moved a little, I soaked it and was able to finally remove it. My calipers were replaced a few years ago, so I don't know why the pins are so hard to remove.. good luck, they'll come out eventually..clean the pins and use lots of penetrating oil.