Long time ago, used rallye wheels in similar condition. First I had them sand blasted. Then I spent quite some time cleaning the sand, etc.. out of the nip where the 2 parts are welded together, and I did some filling and sanding at a few small scars. I used dupli-color primer and paint to get body color Spinnaker white. I flooded the nip area and pushed it with compressed air too, attempting to cover the tiniest spot where rust might grow ( it would really show on white ). These wheels still looked great years later when I sold the car. So I guess my point is in the prep work, Remove the rust versus chemical treatment. I have used the Rusoleum Reformer but in my opinion, it dries too fast to fully saturate and neutralize rust in thicker metals.