Making rebar and #9 supports. Will rusty rebar and new support wire smell enough to make a difference?

No.

And dying would just add another smell to It.

^^^^^^^^^^^^^^^^^ Agree, in most good coyote habitat, around rural farm and ranch areas, coyotes are very familiar with rusty metal scent and do not shy away from it.

The rust wont matter. I suppose it's possible your role of wire might be oily though, but that may not hurt you.

It seems wire is way more oily these days so I like to degrease it.I don't mind rusty supports but I have some areas where grass is very light in color,so I like to paint those supports and snares a light tan.I do this months ahead,kust to be safe.

I use fencing wire no oil on It.

Is it as soft,Beav?

Nope It's pretty stiff.

There was some wire that I needed to anneal It so I could bend It multiple times with out It breaking. I found when I welded It to my support, the wire was compromised and broke off at the weld. I stopped doing that and had 2 holes laser cut to except the wire.
I'm going to have to try and post a pic of my set up.