67-9 cuda door repair questions

Ok so mocked up latch from 70 duster and other rods etc from 69 door. Still needs some tweaking but I think I can get it to work. Also checked the one ballstud and zapped with welder. In there sturdy. They were mocked in the 69 door. Due to limited space I would like to get 67 door installed back on the car(mods to be done later)Limited space and these loaded doors are awkward to be constantly moving them lol. I also want to get remove the 67 guts and then "protect" the inside of the 67 door shell. Any recommendations? I was thinking white rustoleum, just to make it easier to see inside when doing final adjustments. Suggestions ??
Thanks
Steve.