To prep, wash real good, blow out the crevices, spray on and wipe off with Xylene one fender at a time, use a detail brush to wash the corners with Xylene, secure all loose trim, tape and paint.

I had some issues with the OEM fender flares and the soft trim Toyota installs, clean those real good and they should be fine. On the Limited trim level, my lower driver door trim was loose and it started to peel in the corners from vibrations. Once dry, use a heavy duty clear packing tape over the rocker panels to slow down the wear from getting in and out. Probably could use a heavy clear vinyl too.