Address undercarriage rust/ Noxudol 300

I recently noticed the beginnings of undercarriage rust on my 2021 Tacoma. They changed to salt for the roads here a few years ago. I was thinking about applying Noxudol 300 myself but their website says you have to remove all the rust first. How would you do that?

Has anyone here ever used Noxudol or know of a better option? —Thanks

 

While I'm not familiar with Noxudol, I have used my share of Lanolin based rust protection (Fluid Film, Wool Wax, and Surface Shield). As long as the rust isn't flakey, a quick scrub with a wire brush is all I've ever done. If the rust is flakey or the rust is under some paint, then you have to be more diligent about getting the surface clean, you don't technically need to remove all of the rust, just get it so that there isn't any rusty areas that aren't "wet". Best practice is to inspect and re-apply if needed annually.
I've always liberally sprayed my wiring/electrical connectors/rubber fittings with my rust protection and never had a problem. After looking at the SDS, it doesn't Look like the Noxudol is lanolin based. You might want to test the compatibility with your non-metal parts, or keep it away from those parts. Naturally, keep the material away from your exhaust system and brake parts.

 

Someone please correct me if I'm wrong, but isn't the 300 similar to the stuff they were applying to the early 2nd gens during the recall, which after a while made stuff worse?

 

Just use a lanolin based product, it works well
It also wears off (yearly application recommended) so if you decide to change in the future it’s no problem

 

I like using a wire brush or wheel, then Ospho to convert rust, and finish up with Rustoleum Industrial Enamel spray paint.

If you want to get fancy, try POR15. I will go that route for a resto, but not for minor touch ups. The photo is POR15