The sketches are always made up of composite views – I only draw when the car is stationary. Have started using my Pentel Pocket Brush – in the past I have been afraid to use it since it is so bold and once you make a line there is no going back…but now I am love it!!! The colouring is always rather out of control as I am not always looking at what I am doing – combination of WC pencils and paint with my waterbrush.
BTW once the car arrives at my destination I stop drawing/painting ie. I never touch it up later.