I use FF on it, so washing it is counterproductive.A 2011 has that much corrosion? Do you never wash it? People come into my shop all the time with early 2000s Toyota's and while they're not perfect they're not an inspection failing safety hazard. 4 cans of fluid film would stop any rust from continuing, and I don't even think Toyotas of that era have brake line corrosion problems, unless it's from the inside, do you regularly replace your brake fluid?
Also… FF is a bit of a joke…. Sorry, stuff is absolutely lousy any place that gets wet. Learning this the hard way.
Brake fluid flushes every couple of years, but does nadda for the outside of the lines.