What's the best way to cut diamond plate?

[KC10Chief]

I am wanting to cut some diamond plate into some triangles to make some teeth for the grille on my bus. What's the best way to do this without discoloring the metal? I don't have a cutting torch or anything. I do have a chop saw, and an angle grinder. I was planning on just getting a piece of chrome diamond plate and cutting a strip out if it with my angle grinder and a cutting wheel. Then use my chop saw to cut the teeth out with. Any other suggestions? Thanks!