Things to remember about welding #1 Burns hurt #2 got to be clean real clean #3 Get flashed hurts long time #4 tack tack tack long runs #5 heat warps metal ( in a rush might not be time to weld) #6 always ground direct to what your weldeng .Unless its your in laws stuff then ground to back bumper then arc across water pump . Flashing the in laws is ok