The recessed pivot nut for my front brake calliper (no. 4 in this diagram) has seized inside the fork.
I've managed to remove the brake calliper itself by unscrewing it from the front, but the nut is stuck so tightly that I'm worried I'll round off the socket if I try to extract it with a hex key. I've tried dousing the assembly in GT-85 but it doesn't seem to be helping.
Someone suggested screwing an M6 bolt in from the front and knocking it through with a hammer, but I'm not sure how hard I can safely hit it (my careful attempts so far haven't worked).
Am I likely to damage a carbon fork by doing this?