I am looking ahead toward installing metal patches both inside and outside my passenger side door. There are posts that describe methods for doing the welds, and how to smooth and treat the welds for future rust prevention. It occurs to me that treating the backsides of the welds..those inside the door.. is a problem due to inacessibility. I can reach down inside the door with a spray can in my hand but have little control of what I do with it. Any solutions?
meansam