Hello. Im new I’m working on a 54 f100 now I’m looking for a way to finish this seam on the front of the finders and the lower hood nose it’s rough I would like to make it look like a seamless blend really don’t want to weld the entire seams it will be over 6’ of welds I was thinking about filling it with green fiber filler but is that ok or is there a another-better way?