Trying to get the hats free from the rotor rings. Bolts are off, been soaking the hat/ring interface with Kroil, but nothing budges. What direction do the hats come off (e.g. towards the outside if the rotor assy were mounted to the hub, or towards the centerline of the car)? BFH a (rubber or not) OK or a no-no? TIA, LL - NY