We have been reminded before that a bulge usually stretches the metal resulting in a somewhat thinner wall thickness in the area of the bulge where the dent does not usually end up with such a stretched area. However, the stretch and the amount of thinning may be very minor and is capable of being measured when pounded back into place. A review of the inch by inch pressure measurements done by Sherman Bell some time back may also give us a clue about whether we are in a significant pressure area or beyond.