Its been a talking point about spraying or lubing the rotor/hub faces since you are modifying the friction of the bolted joint. With that said im sure the safety factor on this joint is pretty high. If your lugs don't loosen then its probably good
For my jeep which see's water/mud..etc I anti-seize everything I can when I take anything apart. I keep the rotor face dry and only do a tiny bit on ID and keep most of the face dry and clean.
Luckily in Florida Ive never had to cut any rotors yet
Hammer > Heat > Cut