To expand a bit on Jdc1's reply, you really want your primer to have the best adhesion possible to the metal. As such, why would you want to put some cheap and easy primer underneath the epoxy primer, potentially sacrificing its bond to the...
Running like Usain Bolt.
After I fixed the linkage between the choke and primary throttle plate, somehow I had the linkage on wrong. It would close the choke butterfly but not open the primary butterfly down below.
It made for some...
I have a friend that adds part of a can of Seafoam to the oil in his F150 every other oil change……..I’ve never tried it in oil but I use it in my gas periodically.