I am replacing my rear frame rail. If I use weld thru primer ( Eastwoods ) on the areas behind the rail, and around the torque box do I just leave the primer around the weld areas after. Can you paint over the weld thru with something like Eastwoods Rust Encapsulater or Chassis Black etc. after you are done. I guess I just not sure of the proper method of use on weld thru and want to make sure I don’t screw something up.