I read somewhere in the accident report about the fuel migrating to outside of the skin and along the fuselage,
Yes, that was an explanation of one of the probable causes of fuel getting onto the very hot SCP pipe. Fuel could have exited the No1 Tank blow-off valve, which is on the stbd fuselage just under the wing joint, and run down the side of the fuselage and then into the area of the SCP pipe. Combustion analysis has proved that the small amount of fuel (300ml) that could have been retained in that area up against the SCP pipe, would have been sufficient to start a fire big enough to damage the No7 tank fuel pipes (above the SCP pipe) that would then add more fuel to the fire.
Ed