I have used fluid film. It did a good job of protecting my Toyota frame. I used the rattle cans. It was messy. But I’m willing to do it again. But is there anything easier to slide under there and hit the frame and rear end to give it mild protection. I don’t live in a salted area. They maybe put brim down two or 3 times a winter. I keep my butt home normally. What’s my options. Thanks Wardawg
options for undercarriage rust protection?
- Thread starter Gawardawg
- Start date
Wool wax, Fluid Film and Surface Shield all do the job well. Surface shield seems to stay on the longest of the 3. They are all unfortunately messy during application.
NH Coatings also. They have a few products. One you brush on in areas likely to have the product hit by water thrown up while driving.
I assume pro applied hot oil undercoating is the standard.
Mobil 2 with diesel, 2:1 ratio through a pump sprayer. 
This guy is local to me and has sprayed my last two trucks. The undercoating/rustproofing stays semi-tacky forever (yeah, it’s kind of a mess when working on the truck). You can buy his products in aerosol cans and in quarts for spray gun application. He sprays the inside of each panel/hood/tailgate, etc. It’s a very unique coating and works extremely well. The name is Rick Fennell Rustproofing. Here’s a link to his products if you’re not local.
http://ducarle.com/products.html
http://ducarle.com/products.html
A leaking power steering hose is a highly effective rust preventative
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Surface Shield
The rattle cans kind of goop up but you can buy FF in gallon cans then use an air compressor and sprayer. It's still messy, and you have to transfer the product from the can to the sprayer and it doesn't cooperate.
Do all the cars at once, wear old clothes, put a towel on the car seat if you have to move it to bring the next one in. And wear a respirator, it gets cloudy under there and that can't be good for you.
Do all the cars at once, wear old clothes, put a towel on the car seat if you have to move it to bring the next one in. And wear a respirator, it gets cloudy under there and that can't be good for you.
Paint
This is something new to me in my knowledge and in my area. It's WAXOYL
The shop has been around for about 25 years and 10 years doing some kind of rust control type of products but this stuff I believe is NEW.
https://corrosionproplus.com
Watch some of the videos. I can't believe that the guy isn't wearing any PPE or protecting the vehicle paint/windows/interior for the over spray.
The shop has been around for about 25 years and 10 years doing some kind of rust control type of products but this stuff I believe is NEW.
https://corrosionproplus.com
Watch some of the videos. I can't believe that the guy isn't wearing any PPE or protecting the vehicle paint/windows/interior for the over spray.
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I live in North Carolina. I’ve searched lightly, for a shop service that does it professionally. Kinda don’t exist in my neck of the woods. I’m still searching. I don’t have a rust problem. But wanted to put a protective layer on it for years down the road. I want to keep this truck. 2025 Nissan Frontier. Retired deal. I glanced underneath it yesterday. It’s clean and rust free. I remember my 2005 Tacoma frame getting rusty . I sprayed it with FF after the fact. Messy as heck. Crap all over me. Glasses and the wife said the garage smelled like ASS. She wasn’t wrong. 
When I applied FF, it smelled too for a couple of days but then went away.
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- May 4, 2025
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I have always had good luck with FF.
You will never get paint into all the places a rust preventer needs to be sprayed in.
And you want a product that creeps.
