Complete beginner. I started with a darker yellow base coat, then a brighter one. After that I put on a brownish wash. Once dried, I wanted to try to go back with the brighter yellow to re-establish the bright color, and this is where things sort of fell apart. The yellow turned greenish and inconsistent over the now darkened undercoat. Now the model looks grimy and dirty, with little depth. Is the key just to apply more layers, or should I use a different approach once the model has been washed?
The model is a PLA print, hence the detail loss on the model