[White Shadow]

I'd never rustproof an older vehicle. Very likely to trap moisture etc. under it and compound the problem. Same with POR-15, I've used it a lot and would not put it on your truck.

FluidFilm will absorb into the rust and prevent further deterioration. I've not used NHOIL but it should be similar.

 

[White Shadow]

Yes, you can add graphite powder to WW or FF to make the product black. That's how they do it. You can also add mint oil or scents of your choice to it. FF tends to smell like a sheep farm, where WW usually smells much better, like a hand lotion. All batches of it smell different though. I have the standard spray gun kit, another cheaper universal undercoat gun I bought off Amazon years ago and I also have an Astro Tools undercoat spray gun. My compressor is a Kobalt quiet tech 26gal unit I bought from Lowes some years back. I have used rattle cans of FF over the years. They're nice to have around for a quick shot here and there during a brake job, etc. Welcome to kellsportproducts.com - Woolwax lanolin vehicle undercoating. Woolwax stops rust ! is where I get most of my WW/FF products. Either directly thru them, or through amazon, ebay, etc.

Cracked me up with the "sheep farm"... I have a different reference term but it definitely has to do with a certain part of an animal!