[KTL]

Next time you hammer them out, use something different as a sacrificial hammering piece. With the nut, you're hammering on the threads. Instead, use a piece of block aluminum or a brass rod. Something "soft" that doesn't damage the stud

Granted, the end threads on the stud typically aren't that important since the lug nuts aren't bearing on those end threads. But if you booger the threads, it makes threading the nuts a pain and then you gotta run a thread die or thread repair file on them to clean them up