It is somewhat controversial... A pannelwash almost always is a good thing. But none of the TIE models had any washes... All they had/have are dinks I en surfaces, tho I'm sure they come from the crew handling the models.

I'm no expert. Even tho it felt wrong I finished my Vader TIE fighter with very little wear. I was considering giving it a light dry brush to highlight the details that way, but I decided against it.

But I guess it's personal preference. You Defenatley hit the color hue.