I pick dry pigments with a brush (not wet) and place them directly where I want. Once the base is done, I drop few drops of alcohol that will fix the pigments.

There are many ways to place pigments, that's the one I use for my bases. Check the AK Interactive faq/video on how to use their Pigment Fixer (burnt model plane tail), very interesting.

The brilliant ones on the 2nd and 3rd side