for people that still have a mangled locking bolt on their wheel, i had the same problem on a merc i have. both fronts were overtightened etc. after the locknut tool failed to work, and i was left with badly chewed bolts (or maybe in your case above, with hardened spinning tops,) i had to resort to electric powertools. namely a black and decker powerfile. which is a small belt sander to bodyshop guys...

i cut from some very thin tin can, a strip of metal wound into a tube, to slide into the gap between the nut and wheel (extending out 10mm) to protect the paint, and firstly with a hardened drill bit i tried unsuccesfullly to get a start hole, but quickly got out a powerfile, and modified it with a long nut and bolt to the end of the 'finger' (sideways) to aid holding it steady with some mole grips, and gently offered the belt tip to he bolt, yes at first it tries to fly off, and the tin tube stops it a little, but protects your rim, and by twisting the file a quarter turn, back and forth, you can grind away a dish shape which you gradually file away down the shaft of the bolt. After around 15 mins of this, and maybe ten belts (from screwfix) later, you will have either given yourself a better chance with a nut removal tool, or removed enough of the bolt to enable the wheel to come off, and the bolt remnants to easily unscrew, and be throw away, -with considerable force! lots of sparks from the powerfile with this, so eye protection, and maybe some masking of wheel too.

Reading through this it strikes me that anyone with locking wheel nuts who wishes to keep them should be getting them all undone, copper greasing the wheel stud and refitting the locking wheel nut to a "reasonable" hand tool tightness only.
Then a couple of times a year loosening the respective nuts and re-tightening them. At the slightest sign of the locking wheel nut becoming damaged it should be replaced with new.

I don't know that wheels ever get stolen these days anyway, -must be price of bricks! How the world has changed!

They were only saying on the local news the other night that is an acute shortage of Bricks in the region, and with the demise of the milkman, there must also be a shortage of milk crates. But I wouldn't like to rate your chances of getting a ffrr to balance on 4 milk crates anyway, maybe the Tea leaves have worked out the maximum loading for a milk crate and the ffrr exceeds this. I bet they are scared of falling foul of the HSE, there aren't any load ratings on milk crates  Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

supershuttle wrote:

So I don't often recommend or endorse people on the forum but I have to say that Steve www.thewheelnutman.co.uk was both professional, determined and ultimately successful at getting my Locking Nut off - without damaging the wheel.