trying to describe what to do here is tricky, but PLEASE dont weld that replacement flitch panel in with a huge overlap.
i never overlap panels as it just creates a really tiny gap for moisture to gather and rot the new panels out. the only problem is you need to get the fit really good, and butt welding body panels requires a bit of experience to get right or youll just blow holes in it.
offer the repair panel up to the car, mark down the edge with something sharp, then cut about 10mm from it so you only have a 10mm overlap when you put the two panels together. or if your feeling brave and want to butt weld it, cut down the line you have scored and weld them edge to edge.
i have seen these welded in with about 5 inches of overlap, and its just horrid. you want either old panel, or new, not one on top of the other.
Edited by cradley-heathen, 06 March 2014 - 12:24 AM.