I've looked closely at the Duxford B52 in the region of the fuselage skin above the nosewheels and forward. The monocoque structure has what looks like a classic tension/compression field pattern clearly visible each side of the aircraft. I had concluded that this was solely due to the shear force from the dead weight of the long nose cantilever, acting at the nosewheel as the static support.
However, your comment about crease marks noted after the final landing suggests another possible contributory cause. The braking parachute and reverse thrust would have been accompanied by heavy braking I would expect, and the nosewheel braking force acting with the lever arm of the nosegear height would apply a hefty bending moment to the fuselage at that point. Maybe this might have been responsible for some of the skin rippling in that region?