It's a challenge. I am still, nearly two years in, learning and experimenting. Like the alchemical Elixir of Life, I feel I am close to the breakthrough but it is forever just out of my grasp! The wash works on certain models, and I am close to effectively hiding the glossy sheen. My old technique might work in acrylics if I use base colours over a black enamel undercoat. But ... that still means using some enamels.
BTW, I say 'dip' and it can be used like that, but I am brushing the stuff on rather than actually dipping.