saw plates old VS new

[David Weaver]

Check my post on the preceding page, I've added more suggestions.

I'll sand them free of rust, but if you want them to be bright, you'll need to do that. I always sand with silicon carbide and WD40.

They'll certainly be fine for hardness testing. If you want to map them, you can use a white paint marker or score them with a carbide scribe.