I am about to embark on tackling my first Airfix model (BF109), and I looked through the instruction and it doesn't give you a paint color key to correspond to the numbers in the instructions. So I looked up the numbers online and there is a color chart for the numbers. the only problem is they just seem generally stated. There's no specificity to the precise paints. Is there something I'm missing or is this how Airfix models are?