In the fight against rust, nearly every project involves some time spent painting something. I’m replacing my radiator and while it is out I am inspecting and repainting all the steel transmission cooler lines, as well as touching up anything else in that area. Here I used a rattle can on the mesh that protects the A/C condenser fan. I was able to shove a few pieces of cardboard behind the blade to avoid coating the condenser with spray paint.