Polyfilla
I'm not surprised they've postponed - the quality of that foam sculpting is awful!
Space shuttle Discovery will not now lift off on its final STS-133 mission to the International Space Station until 3 February at the earliest. The venerable vehicle was grounded on November 5 when NASA discovered cracks in two of 108 U-shaped aluminium brackets, known as "stringers", located on the external fuel tank. …