Cemented pin on brake caliper

[TNMUP18]

This is such a 'rookie' question, but I just started the job of replacing rear rotors and pads on my 03 Cayenne S. I haven't replaced even the pads on the back in at least 5 years... and the dang pin (with the cotter key) is CEMENTED in there. I have scraped, WD40'ed (maybe a no-no?) banged, hammered, and sledged on the thing and it won't spin or move at all. I've been at it for (no joke) a couple hours! I know perseverance is a virtue when working on cars, but this is plain frustrating! Anybody have any magical tips? I've never had this type problem before. I thought maybe something was putting tension on it, and I've clicked the emergency brake over, made sure the clips weren't too tight, scraped and scraped! Any idea or method is welcomed. Thanks,

Ken

[04TurboCab]

Have you tried putting some heat on it? Sometimes done correctly and with caution, that can help to loosen things.

[TNMUP18]

Thanks for the response. Like everything, and fortunately with minimal scratching of the caliper, it came loose. Only then to have my emergency brake hanging on for dear life to the rotor during removal, as firm as my passengers when I take my favorite off-ramp in either one of my cars! The heat gun was next, 04TurboCab... thanks, Ken