First I apply watercolour as a base. Then I start to apply Polychromos pencil colours by Faber Castell. Along with the pencil colours I also use water-soluble wax pastels, Neocolor II, by Caran d’Ache. I find this product really good when I want the colour to be more opaque. I gradually apply once more the Polychromos when adding the details. I have no particular order with these mediums, I just apply when I think it is necessary. Finally, I add some highlights with white gel roll. That’s it! Oh, and always remember to keep your pencil sharp and pointy.