Scale models are serious business. While we may have thought of them as toys when we were kids, as grown up petrolheads, we learn to appreciate the amount of love and detail that goes into making them, and soon realise that if you can't have the real thing, a good scale model can bring you at least some of that thrill. But where to begin? How much do you have to spend? Which should be your first model? We break down the whole process for you.