removing name plates

[doubleboost]

I would say not possible
Even using cobalt drills
I remember them on BMC engine blocks
They were like hammer in self tappers
I am sure i have some at work
John

[Bill Gruby]

Absolutely hard to drill even with carbide. They are small and if you do manage to get a drill bit started it will walk all over the place. A new hole is the only way I know of. As said these little buggers are hard.

"Billy G"

[Mayhem]

These were hammered into the mill in 1969/1970 so have had plenty of time to get stuck in there!

I will continue to try the slot and turn method, as I may get lucky with a few. Those that put up resistance will be dealt with by drilling around them.

[Tony Wells]

If you're planning on doing a full-on paint job, you could carefully heat them, being careful not to damage the plate. If the plate is a silkscreen job this won't work without damage. For thicker plated, with a small flame, you can bring the rivets to a high enough temperature to soften them a bit.
If you drill with carbide, be mindful of the brittle nature of it. And yes, they have to be hardened to work the way they are intended.

[Mayhem]

Unfortunately, they are all silkscreened. Hmmmmm, wonder if I could build a small EDM

[Tony Wells]

A handheld spark eroder. I don't see why not.