When I was buying some equipment ~20yrs ago, I discussed hot honing with them, & they said the NAPCAR guys were trying it but it wasn't getting the results they were expecting. I said that didn't make sense, & was curious why, so I stayed plugged in to it.....turned out they needed to pre-heat the honing oil, otherwise the cooler oil caused distortion, plus the type of stone was specific. Any insights of Your own You'd share? Much appreciated.