Pan - yes large oversized will sometimes scrape the PC. I found one-shot ($$) or BLL (really light coat) makes sizing MUCH easier with almost no distortion or scraping. Might try some cheap liquid auto wax - just a tiny bit - I use ~ 4-5 DROPS - not drips per 100. Water works but then the sizer can rust - bad.
PC can take most any over temp cooking BUT if close to slump temp the alloy acts funny and the PC will peel off in strips. I've cooked PC for 1.5 hrs proper temp - no problem.