Tim is correct, fibreglass resin chemistry has improved dramatically over the last 60+ years. Some of you will know that I own the Black Knight prototype and used this as my main source of transport for many years, even taking it to South Africa for a year when I worked in Pretoria and also took it on a camping trip to the South of France. There was always a bubble which would form in the heat on top of the front mudguard, approximately where the transfer sits. I tried several time to sort this out and repainted the item and yet, when left in hot sunshine the bubble would always re appear. Many years ago I decided to sort it out once and for all and took all the paint off the mudguard. What a mess. There were multiple layers of paint including one which seemed to be some sort of rubberised underseal, but on top of the guard. When I final got all the paint off you could see the individual strands of glass fibre with large enough voids to see right through the mudguard. It was the roughest piece of fibreglass work I have ever seen. And yet, 65 years after manufacture it is still usable. Good stuff, fibreglass!