Tangent Scale Models
What you say is no doubt true, but the bigger takeaway is if you are washing factory-painted cars with weathering washes, put a "barrier" coat on FIRST that is a non-laquer product. In other words, use a product like Testors Model Master acryl semi gloss, or a vallejo acrylic. The sequence here is critical - yes you have to apply at least 2 clear coats to the model. You won't regret it!
Don't wash away the beautiful stenciling (that is, unless you want to as a weathering effect!).
Tangent Scale Models (and a modeler when I have time)