I just tore down my Pikes Peak motor (which was coated with high-temp vht enamel). Nothing wrong with it, just "improving" it for next season. Anyway, the only change I saw was that the enamel came off the magnets. Everything else looked pristine the way I left it. I suspect it was my prep job. I wasn't sure I could roughen the magnet surface to paint, so I just cleaned and left it. However, there isn't any visible rust/corrosion/damage of anykind (I was running ATF fluid).
9c 9x7f w/ 12awg phases
9c 8x8r w/ 10awg phases, temp sensor, vented
9c 6x10r w/ 10awg phases, temp sensor, liquid cooled, 3rd Place Pikes Peak 2012!
"Don't argue with the galactically stupid...they drag you down to their level and beat you with experience"