Views about paint shades and colours can go on ad infinitum. Why? Because this is so subjective to each and every user. Methuen values ,modulation techniques, air brush mixes, it goes on and on.
There has been a bit of discussion on here about using auto.motive paints and whether the shade should be lighter to be 'in scale'. Well, I have used automotive rattle fans for years, and no one has ever said to me when exhibiting my models about my plain colours being too dark! My take is who needs to mess about with an air brush to lighten a colour? Guess I am getting lazy in my old age! Metallics however can look like scaled down metal flake on a model so one needs to be aware of this. Great for customs though!