rattle gun would have got that off no probs , hell of alot of oil about in their you got an oil leak ?
Agreed that it looks like chain lube and crap. No signs of oil running so am not too worried.Actually the story was that the nut was seized and I was struggling to get it off with a power bar and socket for a bit. Trying get purchase on the nut while standing on the brake leaning over from the other side of the bike.Then said bugger it and drilled it off in a couple of minutes. If your careful it’s not a bad option in the absence of an impact gun.Running like a dream now, ready for the good Glasgow weather 🙂