What I do for welding butt seams is to place small weld spots widely spaced, and some in between until I have a line of them about 1" apart. Next I weld to the side of each one and let it run into the previous one. Eventually the spaces will come together.
The bondo will be a function of how much you need to cover up.
Last edited by truckernix; 01/05/2011 1:24 AM.
