Salt decontamination and undercarrage TLC

[///Marecki]

Inquiry for the DIY detailers. Winter came a bit earlier this year in the northeast and unfortunately found myself having to drive after salt had been dumped. I'd like to clean the ever living fuck out of the wheel wells and undercarrage of the car and am looking for guidance from people who personally do this with their own cars.

Method - do you remove the liners?
Products - do you have a category of product or specific product you use for this?
Future proofing - I've seen things about coatings or perhaps dry ice blasting the undercarrage. Is this past the point of diminishing returns (i.e. snake oil / burning money) or do you find effective?

In a nutshell my car has made it 20 years absolutely spotless in terms of rust/corrosion and I wanna do my best to keep it that way. Cleaning it before a 3-month storage.

[Cronenberged]

AMMO NYC offers an excellent winter-specific car wash soap, along with a well-developed washing method and protective treatments designed to guard against salt damage. If possible, I recommend lifting the vehicle to allow for a more thorough cleaning. I recently did this myself—removing the skid plate and lower supports to perform a deep clean and apply a protective treatment

[Keith_MN]

I can't speak to the wash aspect more than the obvious, but I have some good experience on treatments.

I've been using a Fluid Film on my year-round vehicles for many years. The key of course is to start using it before you need it. I have a 2014 Tacoma that was effectively new when I bought it. Every fall it gets a thorough undercarriage rinse & let it dry thoroughly. Then I spray the whole damn undercarriage with it, making sure any high exposure areas or cavities that road spray would collect have been coated. I use the straw attachment and spray up and around the drain holes of the doors & gate. I expected it to collect over the years and be a thick greasy mess, but it seems to dissipate on it's own for the most part which makes recoating annually worthwhile. I have 110k on my truck, not a spot of rust on the body. It's not a miracle product, there is definitely some corrosion underneath but it has significantly slowed the development of it. Upper midwest is brutal on vehicles.

If you use it or anything like it, be mindful of where you apply it. Overspray will coat the floor and potentially things directly adjacent.