Fine-tuning the colour
I merge my layers so that I’m working on a flattened image. I use my Chalk brush to rein in some of the contrast and noise, using brush effects such as Lighten or Darken. I also begin to finetune my colour palette using adjustment layers. Here I’m using a Curves adjustment layer, but I also make use of Hue/Saturation and Selective Color layers throughout the painting process.