hello martin.a keen eye has spotted this and its good to get a proffesionals comment,it keeps you on your toes. steve d also spotted the deliberate mistake and as we all know,white paint turns yellow with age and when you have seen a lister with some age on it,you will notice the colour changes in time due to heat fuel stains and the lack of a wash. so what I did was try to match an old engines paint colour and paint mine so that it looked aged.