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Discussion Starter #1
Hi everyone, I'm sure this topic has been covered many times but as I browse the forum I can't seem to find an answer to my question.

So after a month of Focus hunting, I finally bought my 06 Zx3 which has no rust underneath (I put it on a lift to check). Being in the rust-belt however, I know if I fail to do preventive maintenance it will start to rust within the first year.

Currently my plan was to lift the car and spray some Rust-Oleum self-etching primer and then spray the Rust-Oleum undercoating spray, but I am on the fence about it. Doing some research into it I see that people are having amazing results by spraying the undersides of their vehicles with motor oil and am tempted to do this to my focus.

My main question here is does anyone have experience with either of these techniques and which one would they advise me to do? Also if anyone knows of any other techniques with good results, I would love to hear them.

Thanks!
 

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I undercoat cars for a living, i say if the car has minimal to no rust to begin with then spray it! The stuff i use is completely different from aerosol though and alot better! I also use an actual rustproofing material that i spray in all the holes which keeps everything from rusting from the inside out!
 

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if you dont mind a mess and have access to something to lift the car up a good 3-4 feet this is messy so you will need a tarp, a good friend showed me something and i didnt beleive it till i saw under his GM.. it looked like a mess but he told me to grab a rag and wipe a spot.. it was a thick sprayed on type of wax under it was the factory painted frame..

he told me to buy a half dozen wax toilet o-ring seals place them into a cheap high flow spray gun ( he modded one with a 2 foot bent pipe with a wide spray pattern and he placed the broken up rings in the container boiled them till they turned liquid then sprayed when it cools down it turns back into a decent sticky wax mess but it doesnt run off and he usually gives it a quick spray every 5-7 years.. im actually going to knock off the rust on my 06 clean up the underside, install new sills and coat the heck out of everything including inside the sills he also told me to drill drain hols by the lowest seam so the wax can coat it then make a channel straight out

i didnt believe it i thought he was full of it but it seems people do actually do this and several on youtube use that method with excellent sealing results
 

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Discussion Starter #5
Thanks everyone for the replies! I've decided that i'm going to go with a product called Fluid Film. I went to go do the spray job on my focus and realized I wouldn't be able to get into the small crevices with just Rust-Oleum and my jack stands. A friend of mine showed me Fluid Film and said he would help me with the job since he had experience doing it on his vehicles so I decided to go that route. Once I put it on I'll try to put my overall impressions on the forum here for you guys to see.
 

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interesting stuff, but as usual only sold in the US.. no one can supply it to me in Canada

looks interesting and i wouldn't mind trying it
 

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I've used Fluid Film before. Doesn't evaporate, and does stop rust, but it is easily washed away by water. So, any part of the undercarriage that gets splashed or dripped on will lose its protection. I use it it my garage to keep bare metal , like my drill press table, and sheet metal brake from rusting.

I like the bees wax idea. I heat my good leather boots up in the over, and then smear the toilet wax on. Leather sucks it up. Works even better at waterproofing than the commercially available Sno Seal. Lasts longer too.
 

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I used just a oil used on industrial farm equipment that is safe to use for vehicles on the road...I believe John Deere makes some.
 

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My svt is in great shape for a Michigan vehicle. Very small amounts of rust underneath. None on the body. I don't drive it in the winter, but none the less, I've been thinking about treating the rust and rhino lining it. There's a shop a block away that applies it and they did a great job on a buddies truck.
Few guys at work have taken their vehicles to a place called Ziebart. Apparently they are a popular place for rust proofing, but I don't know what kind of products they use
 
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