Hmm, I will give both ideas a go. Thankyou for your help.
EDIT:
I looked at the metal material I was using (from a Blender Material collection), and it uses Stucci textures for various dimple sizes. So there is no Noise texture to replace, however I notice that there is a new way to map bumps from textures. I am going to give those a go next. But I don’t know what the difference is. I don’t know how that new selection works.