I always preferred a good long hand spanking to heat her fanny up to a nice deep red shade. Then a good sound session with the oval backed oak bath brush I got off the Vermont Country Kitchen website. It is WICKED believe me! This usually leaves a nice red hot almost "burgundy colered" bot...

nothing much worse(except the spanking itself ofcoarse. LOL) than the long dreadful wait to get it over with.
Sounds like you really are in for it.