Revell was great with me, my 49 Mercury Custom's engine was badly warped, so I sent a email with a photo and had a new one sent in 2 weeks !
Another one that I haven't worried about was the Special Edition 62 Impala 2 n 1, the 'A' pillar was crushed, seems as though the body was packed on the side of the box!
I bought this from the former 'Model Express' in Canada and Dennis supplied me another complete kit free of charge, now I have spares...cool