The one on the right looks like the straight part of the rod between the two supports has a slight bend that needs to be straightened. Also the first few inches under the button should have a slight arc to follow the center of the hole in the wood as the pedal is pushed down. In your picture the arc looks like it's curved the wrong direction, so I'd check it before painting and installing it. I've had to repair bends in several of these linkage parts.
I'd sandblast that assembly as pictured, then blow air into the moving joints as you work the linkage back and forth to get rid of any grit. Paint it and be sure to keep the moving parts well oiled after it's installed.