Hi I am new here so it will take me a bit to catch up.
I have a 55 1st series chevy truck. I saved it before it rusted down completly behind someone’s house. I have already replaced complete floor pan, door post bottoms, and i am working on everything associated with the front corners of the cab. I am currently working on the doors to replace the inside bottoms of both doors. My question is what to use on the doors once I am finished with repairs. I am wanting to spray sound deadener in the doors before completion. Would it be better to use internal frame coating first to stop any further rust and seal everything up. This seems like the way to go but I didn’t know if sound proofing will work over the top of the frame coating. Thanks for any help