Yup, or just use Flory wash and eliminate all of the guesswork. I'm using Flory exclusively for panel line washes now. That stuff you just slop all over the model with a large brush and then clean up the excess with sponges, Q-Tips, or even clean paintbrushes dampened with water. You can even literally leave it on for months or years and when you finally get around to removing the excess, it will come off easily from the spots you want to remove it from. Its compatible with any kind of paint or clearcoat since it uses no solvents of any kind.