After researching the options, I chose to spray woolwax on all the steel components I could reach with their “pro” undercoating gun, which includes a wand for reaching into frame tubes and tight spots. I managed to reach enough area that I’m fairly confident that I won’t have major rust issues, with annual touch ups here in New England. I wanted to do it myself, because I figured the undercoating companies wouldn’t have experience doing a Lightning, and I wanted to avoid spraying near what looked like sensitive electronics. There’s a lot of steel underneath, particularly the skid plates and support structures for the battery that look particularly vulnerable to me - on the top sides of plates, salty sludge can collect and rot the plates from the top down. Also, the bumpers are steel, so I wanted to protect especially the rear bumper and trailer hitch from the inevitable salty spray that rots them out. I ended up using about 2/3 of a gallon, and I took my time, doing it in a couple of hours. I’m really glad to have spent the time getting familiar with what’s under there, and I’m optimistic that it’ll make a difference. Temps were around 50°, and I didn’t need to heat up the woolwax to get it to flow nicely (they recommend heating it when applying at colder temps). I also managed to reach everything without lifting the truck, but it definitely got a bit tight in a few places, as I’m not skinny! My only issue is that my cat likes to hang out under our vehicles in the driveway, and she came back into the house with a little woolwax on her tail a couple of times (it cleans up easily enough). That prompted me to finally clean out the garage enough to fit the truck inside, where kitty doesn’t hang out. With only inches to spare, I love the camera views for backing in!