Charity Case Ch2:Pg13 Hi-res & process (Patreon)

Usually if I was going to draw a lot of something, I'd learn how to draw it 'properly', but the car features once now, and once wayyy later in the plot, so I'm absolutely just using a 3D reference. Like, the house I know how to draw roughly, I use a reference for parts of it, maybe an angle reference, or a colour one, but it's mostly my own work. The car not so much.

Anyone have thoughts on having the sketch and colour separate + without text? Is it better with a light sketch over the colour, as well as a separate sketch, or do you prefer to see the colour alone? I should probably be more consistent with it, but I'm not sure what's more interesting!