get rid of the rough stuff. nice and smooth now. The reason (they say) the door fillers won't work is because if you look at the 2 kits (Stillen and WW) on a car, the Stillen one sits higher and fits at the top of the line on the Z body where as the WW kit sits at the bottom. So if you use the door fillers with the WW kit your line will not match. You could easliy trim the door filler to match the WW line. Or you could (carefully) strip the bottom part of the door and have it repainted. As my whole car is being repainted this is what I did.