Thanks Adam, and contrary to HM's suggestions, the insides of the tank that failed was very well prepared and continously rotated to ensure that every part of the internal surface was completely, and evenly, coated.
As I mentioned before, I did three tanks at the same time from the same batch, and the other two held up perfectly. The fact that it didn't pucker up for 6 months leads me to still assume that the new owner got some dodgy fuel. Cheers, Terry.
