FJJP
No probs, have those moments myself!
I remember it for two reasons, one being the assembly of a spine skin to the fuselage with black bostick compound on one surface and green zinc chromate on the other - took weeks to get me clean after that!
The other was the attempts by our (71 MU) specialist sheet metal chaps to hand roll a wing skin which went on the lower port wing inboard of the jet pipes. It had about 6 different curvatures and we / they went through quite a few attempts with no success. Until one day, a civvy driver from Barkstone came in to deliver something or other...took one look and said that they had 'undreds" lying on a rack there - how many did we want!