I have searched all over and still dont know what to do at this point. I chopped the top on my car (39 ford coupe). I butt welded the seam on top solid. used kitty hair over that and then used bondo on top of that. painted black and the thing looked great, pulled it outside and the ghost lines showed up in two spots. pull it back in and they go away. i plan on taking it back down to the weld what do i build it back up with to avoid the ghost lines???????