Hello everybody!
I recently bought a fairly low mile 92 4x4 5spd Tracker that I'm in the process of tearing apart for some major rust repair. The poor ol truck has rust holes in the front inner fenders below the air intake and wiper fluid reservoir, several holes in the floor pans below each cross support, holes along the seam between the rear seat support and floor, around the e-brake grommets, next to the front seat belt reinforcement,the whole void space under the rear taillights and of course the hidden front portions of the rocker panels. The good news is the frame is completely solid and she runs and drives perfectly. I have most of these holes already patched and sealed and I plan on using the 3m rustfighter wand, body shutz, rust converter and seam sealer to rust proof the entire body and frame inside and out. This car has lived it's whole life in Massachusetts and now resides in the mountains of New Hampshire. It's my future daily driver and occasional off-roader.
Now that I got the whole back story out of the way I can get to my question. I was wondering if anybody has adapted plastic inner fender liners and rubber sheet splash guards from a newer SUV or CUV for use on a Tracker. If so what make/model is the best fit and how did you attach each piece in a way that keeps your tracker as rust proof as possible? I don't want to spend all this time fixing rust and sealing metal just to have all that protection sand blasted away and salted to death.
I figure I'm going to have to take some measurements and go junkyard part hunting since I haven't seen any similar topics or pictures here but I figured I'd at least ask and possibly save myself some trouble.

Thanks for reading. So sorry for the run-on sentences

Welcome to ZukiWorld, sounds like you have your work cut out for you,
Sorry I don't have much advice for your repairs, I live in California, and
where I'm at stuff just doesn't rust out

Wild

I don't really need any help repairing the rust. I have that down to kind of an art since EVERY car around here has rust except for the brand new ones and garage queens.
I was just asking if anybody else has tried adding plastic inner fenders and splash guards to prevent the salty slop from getting thrown all over the undercarriage by the tires. I've seen how much it helps on ordinary passenger cars so it kind of boggles my mind why these aren't added to trucks to protect them from the horrible road conditions around here.
If nobody's tried this yet on a TracKick I guess I'll have the pleasure of figuring out the proper parts and mounting to share with y'all.
It must be nice to live in a place that doesn't foster some rust BUT if I were you I'd still poke around under there once in awhile in the places I mentioned because -MOST- of the rust was almost entirely covered up by undercoating. Everything looked fine until you poked or scraped the rubbery coating away. My tracker is white so most of the rust at least showed up as a brown stain on the white undercoat.

Ya, I have poked around quite a bit, and even cut the rockers open, but
not to repair rust, to add a beefy slider as part of the body for max clearance.

I only have an '89 so it needs about 50 more years before the rust sets in

Sorry to be such a cheek, but stuff really doesn't rust in my area, the worst
areas would be down by the beach where the salty air seems to have an effect
in starting the rust process