Car & Truck Rustproofing / Undercoating

This is one of our favorite services to offer - especially in a place like Wisconsin with such brutal winters!
Here are the basics of our undercoating: It’s a semi-permanent lanolin-based fluid film coating with no solvents - that means it never dries out. It penetrates deep into the metal to prevent water, salt, and oxygen from oxidizing the metal.
I use this rustproofing on my personal vehicles and wanted to show you the process on my own car below!

FAQs at the bottom.

-Matt

The egg, in all her glory.
My 2012 BMW 3-series sport wagon.

I want to keep it nice, so let’s prevent the snow and salt from ruining it!

  • Up she goes!

  • Stopping existing oxidation

    I start with spots that are already corroded so it gets covered twice. The coating soaks in and slows the oxidation significantly.

  • Suspension

    I fog the coating around suspension components to completely cover them. These are the most exposed part of the car. Hopefully keep these parts nice for a long time and save money!

  • Bare chassis & wheel wells

    These are also super exposed because your tires are kicking up material from the roads constantly.

  • Frame, subframe, etc.

    The meat and potatoes! The subframe is especially important because these can rust out over the years and cause terrible issues. We get every bit of the frame as well.

  • Doors

    Doors

    We get inside the doors because water naturally drains through them. The coating makes sure the water wicks out and the bare metal is covered.

  • Hinges

    Not only protecting an exposed area, but also ensuring smooth and quiet opening and closing!

  • Engine bay

    The strut towers, top of the frame, hinges, latches, and inside the hood are the targets here!

  • Misc.

    The last little touches here and there like the crash bars and touching up light areas. And we're done!

Rustproofing FAQs:

How long does it last?

This is a semi-permanent coating, which means unless it’s manually taken off, it doesn’t really fail. That being said, I recommend having it re-applied or touched up every 1-2 years because some areas might go thin due to washing or heat, since it is an oily, liquid product.

Is there a warranty?

Yes! AIM Auto Spa provides a 1-year application warranty with all undercoating and ceramic coating products. If there are any issues or light spots, we will fix the issues as soon as possible at no cost.

Can I still get the underbody wash at an automatic car wash?

Yes, I recommend it! As long as it is a relatively low PSI water jet with NO solvents/soaps, there should be no immediate issues. However, if you frequently use these, I strongly recommend having the coating re-applied every year.

My vehicle already has some rust. Should I get it undercoated?

YES! That’s why I chose a lanolin-based coating - it significantly slows the spread of existing rust as well as protects areas without it. This is where a rubberized undercoating falls short. Ours is the best way to maximize the life and longevity of your used vehicle for many more years.

Are there any areas you avoid undercoating?

Although the coating has a high flash point, we avoid the exhaust and engine to avoid potential fire hazards. We also avoid the driveshaft and axles to prevent it from slinging during driving. Lastly, we avoid rubber bushings and ball joints because the oil in the product can cause them to swell and wear out prematurely.