That’s what the NDT guys use to pre the weld pre test.i use a 1mm cutting disc , its laser precise and if you go easy generates less heat too , it taes practice though .
there is a technique involved , ive written about it before. Great on thin sheet metal repairs , car body work etc, not great if your building frames out of box etc though.
I was an NDT guy ,,, it was just a while ago.That’s what the NDT guys use to pre the weld pre test.
it also works well on steel BUT the little bits of sharp metal go everywhere and are viciousA carbide bit in a router works surprisingly well on alloy. Never had the balls to try it on steel though!