ImStricken wrote:its not even worth touching. if anything the rust will act like thread-lock and help. its rather it need to be cut off, than be so perfectly clean that it could loosen itself lol
I'd be way more concerned about it not coming off when you want it to, than it coming off when you don't want it to. Those strut top nuts can be a PITA if they get oxidation/corrosion on them as the whole strut shaft will spin when you try to turn that nut off. Then you are in a hell of a spot.
The top of the shaft has a provision for putting an allen wrench in to counter-hold but that rarely works out, and you need a socket with a pass through. I've had to use a spark plug socket with a hex on the outside bottom where a wrench could be used so I could fit an allen through the center opening. And cutting it off is very difficult since the nut is recessed.
Yes, he's perfectly validated in his concern of that nut becoming frozen. It happens all the time.