I often use lipstick. At $1.00 each it is cheap. It, for me, is not as messy as Prussian Blue, as it is more waxy than oily. I can get very thin coatings by applying it with my finger. As to coloring the wood, one of the reasons that I use it is that you can get about any color under the rainbow, including ones similar to what your wood stain color is going to be,such as dark reddish brown.
Some techniques fit some people, some don't.