Hi guys

As a part of my 'new' bike restoration (very neglected specimen), I am trying to take apart old Sugino Mighty Tour crankset. 4 out of 5 chainring bolts loosened OK, although they were tight and I needed to use longer 5mm 'wrench', shorter one was not providing enough torque.

Problem is that on the 5th one, nut is spinning. Of course, I have park tool to catch those damn slots in it, and I even managed to catch the end of it on another allen wrench that was slipped through another chanring bolts' hole - to stop it from moving, but of course, with enough torque applied, tools just bends and slips out with a happy - BOING - sound.

Right now that thing is soaking in PB Blaster while I think that maybe I should rethink taking it apart after all. I have managed to clean it OK still assembled (I prefer to clean cranks when they are apart, if I am in a uber-restoration mode).

Still, I am not being defeated that easy. Any hints on loosening that bolt/nut in a non-destructive fashion?

... Torch time???