I made this video way back in 2014. I first made and started using these stains in 2008. This video contains insights into how experienced wood modelers make a stronger stain to be able to work faster. 

Warning, these recipes are used actively by me in my work. They do require some practice to make sure you know how they will affect your modeling. Personal experimentation with these solutions are a requirement, especially for newer modelers.

I make a stronger stain then normal plastic models. It is made to work in one or two coats, and often require other substances to finish off, like acrylic paints and oil washes