Yes, but they're pretty much located in the Rust Belt. Zeibart has been around for decades, but there're a few others, many products out there. If you have a compressor you can do it yourself.
For a quickie job you could buy a bunch of cans of 3M Cavity Wax and a pack of long spray wands and do it yourself. Key is to not spray too much at once,
best to do a few quick/light passes. And if you don't want to drill holes
in the sheet metal (I wouldn't) you can remove all the door panels, cargo
area panels, etc, and spray it in that way, but be carefull you don't get it
on the upholstery.
There are also rubber plugs on the backside of the rocker panels,
you can pop a couple of those off and push the wands inside the rocker
panels and spray them that way.
The rear liftgate and hatch both have access panels that could be removed
to get into those spaces also. For the fenders, plenty of access points
and don't forget the engine bay; everything is exposed to the road salt/chemicals there.
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