Yes.
After three years I can unequivocally say Fluid Film works...and works well.
I apply the undercarriage spray yearly. We no longer use rattle cans for that, rather we had a local auto parts jobber (like NAPA but independent shop) bring in gallon cans. There are larger pails of it but the jobber didn't want to get stuck with those...
So, shake the bejabbers out of the can, load up a slightly modified Schutt gun (I think that is what it is called) and simply hose the entire undercarriage down, from all angles and it doesn't matter where or what you spray. We do that in the fall. just before winter hits.
Further I use rattle cans each and every time I'm into or detailing the Patriot, year round. Every oil change, every tire rotation, any time its on a hoist or the hood is open.
hinges, strut tower bolts, hubs, any and all moving suspension parts, any and all bushings, seals etc. Just a spritz.
I pop my door and hatch panels, pop the inner fender liners and spray away. I even wiped down my visible metal when I swapped my radio for a Pioneer.
It works.