Anong advantage ng scrap to metal over washover?

Kasi aside from being cheaper and faster, if done properly, won't the washover preserve the original rustproofing and add another layer of protection pa nga?

I bought new doors for my lancer, and the new doors werent of the same color. I had them washovered with the rest of the car. I figured, the original japanese rustproofing of the doors would also be preserved. Does my philosophy make any sense?