Weld Pin Holes and Body Filler
I am at a point where I am ready to put filler on some of my rear fender weld seams on my 49 Chevy. I have a dilema going at the moment. The weld seams are quite long and cut right through where the inner rear fender and exterior fender section meet. I suspect there are some small pin holes in that seam, but I am having some problems.
It is difficult to see if there are pin holes or undercut for sure. If you are looking at the seam from inside of the car, there is a small space between the inner fender well and outer fender. The area is not accessable because of the way the body comes together. I can barely reach my hand in there, and not even to the half way point. I was going to try and roll or brush on some POR15 and then seam sealer between the two body sections to ensure a sealed seam, but I don't think I can even get a brush or roller in there. I could seal the interior side of the metal with some of the 3M inner body cavity that has a long spray tube, but that does not take care of potential moisture problems if there are any pin holes. I have been trying to fill (weld) them but unsure of that specific area. I have thought about using various body fillers, but that would not eliminate the potential rust behind the body filler if moisture was able to penetrate from behind. Anyone have any ideas or experience with this problem. I have even thought about using some metal panel adhesive from the front to initially seal the seam, but I was unsure of the compatibility of filler on top and or paintability of the adhesive. Probably a nutty idea anyway.
One last note. I have been shining a light from the outside of the panel to identify pin holes while looking at the weld seam from inside the body. If you are not looking staright at the seam, pin holes are hard to identify. Because of the lack of ability to get a straight on look at this area, I am unsure of any potential problems. Any ideas recommendations on this one?