I have BC RS coilovers and the bottom bracket used to raise and lower the height is stuck as well as the locking perch above it.
I tried:
- loads of anti-seize
- the included spanner wrench with a long breaker bar
- heat gun (I think aluminum expands more quickly than steel)
- strap wrench on the middle of the shock and a bar between the mounting holes on the bracket

Any other ideas?