welding cut out bulges onto flat dart hood?

Hey guys I am in the process of welding 68 dart bulges (cutout from a bulge hood) onto a flat 68 dart hood. My plan is to lay them on my flat hood and tack weld them on aprox every 1 1/2" - 2", them have a good body guy level and repaint the hood. have any of you guys done this before? or have any tips, I know i have to watch for heat, so i plan on laying some wet cloths around and under the hood when I start welding.. thanks