Check this, easy to get to

back of front wheels wells, take the piece of plastic off and move the fender well cover back, might have to remove a couple screws, a known place for leaves and debris to collect, the fall down from the corner of the windshield,
some people have been creative and making a mesh piece upp to to stop the leaves from falling down there. I did this, and the wifie was doing something and pulled them out, brought them into the house and asked "What are these"? Wimmen

Leaves Accumulating in Front Fenders

Is anyone else having a problem with leaves accumulating in the front fenders behind the quarter panels? The holes at the top of the fender where the windshield runoff drains are large (2016 Canyon SLE) with nothing to stop the leaves. There is one 3/8" diameter hole at the bottom to drain. I...

www.coloradofans.com

 

Ha, my dealer asked what the pool filter material was doing stuffed in that void... my response was "correcting an engineering defect - don't touch it or put it back the way you found it"

 

@Hunter62 Thanks! I've been thinking of putting Z71 flares on but am a little worried I'll pay for it down the road once the sand and salt finds its way in.

 

Inside edges of door seams where the outer door skin folds over the inner door structure. Generally minor, but something to look for.

 

Yeah that is the only issue with mine
Mine has been like this for years. (at some point I will work on it)

 

Yep, all those little nooks/crannies around doors, fender wells & tailgate. I keep quite a few of those free Harbor Freight micro-fiber cloths under rear seat storage & use after every wash. You'd be surprised how much crap gets lodged in these areas from wash-to-wash.

I might try the Woolwax treatment - there's a place here in Omaha that applies. They're treating streets w/ so much salt/brine/sand it's hard to fend off rust. >.<

 

Thanks guys! My plan before the winter is to remove the access plugs in the bed and rocker panels and also remove the door panels. I'll also remove the wheel well liners. Here is my general rust-preventative process that has worked great for me on other cars:

1. I'll wash it all out with POR-15's Cleaner/Degreaser. This stuff works great and is water based. Then rinse it out with water. Really gets rid of grime and dirt.
2. Spray the cavities liberally with POR-15's Metal Prep. It is a zinc-phosphate wash and if there is bare metal or rust it etches it and neutralizes it. Perfectly safe for paint. Hose it out and blow some compressed air in there to get rid of any excess water. Let it dry overnight.
3. Spray the cavities with Noxudol 700 Cavity Wax. It is a lightweight creeping wax that wicks into cavities and creases. Unlike wool/lanolin based products it has rust preventative and rust conversion properties.
4. Spray underneath the truck with Noxudol 300. This is more of a heavy weight rust preventative wax. Similar in weight to Woolwax or Cosmoline but again has chemicals that treat and prevent rust...not just displace water.