Well I have been doing a fairly extensive rustproofing job on my 2014 Ridge in hopes of slowing down rusting caused by central NY salt. Started by power washing underneath -inside frame rails-inside subframes , removed fender liners etc. Let all that dry for a day then used Eastwood internal frame coating on inside of subframes (comes with an excellent long flexible spray tube w/360 degree spray head which lets you get up into normally inaccessable areas) Also up into rocker panels and any other frame areas I could resonably access. I then used phosphuric acid on any areas on outside of subframes that had any noticeable rust (not much of that as truck is pretty new w/20k miles) After that I used Eastwood rust inhibitor (black) over those areas.Fender lips were cleaned -rust inhibitor and entire fender well sprayed with Rusfre which is a amber waxy coating similar to what professional applicators use. Inside of doors (lower half only) I brushed on rusfre.(if I could do over I would use the internal frame coat instead as the Rusfre smells for about 2 weeks). Also removed bed fiberglass sides and sprayed Rusfre in there -can get to a lot that way.Also noticed that the rubber seal at bottom of doors traps quite a lot of wet dirt behind it so it is worth cleaning behind that occasionally.At any rate I think It should hold up much better than my last truck(silverado) which rusted very rapidly.