Agreed. That is why you need to flush all the dirt and debris out of those sections. Just hosing down with preventative over dirt/debris will only give a false sense of protection. Kinda like a condom with a hole.Problem is those boxed frame sections hold moisture....they never fully dry out, and thats where rust starts from the inside out on those taco frames that you never see until its too late. You want to coats the insides well with stuff like fluid flim, or krown when the frame insides are fairly dry.
Sunshine....lots of it.