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Old 05-16-2016, 12:01 PM   #1
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What antirust oil-grease antirust do you use under the MH?

I am in Canada.

Last year under my motorhome (MH) I have removed all the rust, then use rust converter, and finally antirust paint. It is a 1999 and I want it to last another 20 years.

This year I see rust coming out everywhere under the MH again.

So I went at a specialised center that puts a special mix of grease under the MH. I should pay them 205$CAD + tx each year which is perfect for me. This is a huge garage center that process thousands of cars, trucks, bus and MH each year.

But I see that they put grease on my Ford F53 frame but did not do a good job on my Fleetwood smaller frame tubes and plates. Seems like if they don't understand after all those 30 years they have been in business that what scare people like me is not the Ford frame but the MH little steel frame.

I should call them this week and see if they can do some touchups for the spots I have identified. Probably they offer a warranty.

Anyways, I have at home a gun for undercoating. But I don't know where to buy a multi-gallon of special antirust grease. I looked on amazon.ca and could not find anything interesting. I think it would be better if I would do it myself twice a year.

What do you suggest?

Here a picture of Antirouille Métropolitain garage:



Thanks in advance.
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Old 05-16-2016, 01:31 PM   #2
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Once rust starts you cannot get it stopped. I usually just scrape off the worst and paint it with the Rust-Oleum type paint. I touch it up when it gets bad again.
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Old 05-16-2016, 03:11 PM   #3
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Quote:
Originally Posted by Fiesta48 View Post
Once rust starts you cannot get it stopped. I usually just scrape off the worst and paint it with the Rust-Oleum type paint. I touch it up when it gets bad again.
Rust occurs when the metal is in contact with air or water. When we put an oil or a grease there is no more contact possible with water because oil does not mix with water.

This is why we put oil on a firearm when we don't use it.
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Old 05-16-2016, 03:42 PM   #4
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I use Fluid Film. Seems to have kept rust at bay on my 2004 MH. Takes about a hour each summer to keep everything properly coated.
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Old 05-16-2016, 05:16 PM   #5
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I use Fluid Film. Seems to have kept rust at bay on my 2004 MH. Takes about a hour each summer to keep everything properly coated.
In Canada I see this website: Fluid Film they sell kits, gallons, 5 gallons and 55 gallons. They sell a spray gun but I bought one last year for about 20$ on amazon.ca

Walmart.ca and Canadian Tire sells only a spray can of Fluid Film for 16$.

Thank you very much. I will do it myself from now on. I will order 5 gallons this week. I will wait a few days to see if someone has a better price.
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Old 05-16-2016, 07:39 PM   #6
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Fluidfilm, at any price,is better than rusty brake lines,or anything under the motorhome. Stuff is great.
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Old 05-16-2016, 08:17 PM   #7
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2X fluid film. I buy it on eBay. Under my truck with it too.
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Old 05-17-2016, 11:15 AM   #8
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2X fluid film. I buy it on eBay. Under my truck with it too.
On eBay a seller offer 4 gallons. I made an offer for a price reduction and I got 5$US rebate. I feel he would accept 6$ rebate. For someone in Canada I think this is the best price we can get.
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Old 05-19-2016, 05:45 PM   #9
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Questions for you Fluid Film users...

This stuff never hardens per, youtube. It attracts and holds dirt, again per youtube.

What does the underside of your MHs look like after several years of using Fluid Film?

I assume that you re-coat at least once per year. Do you pressure wash the underside each year before re-coating?

I have this vision floating around in my head of an overloaded mud ball of a MH driving down the highway. Educate me.

Thanks.
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Old 05-20-2016, 08:45 AM   #10
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Questions for you Fluid Film users...

This stuff never hardens per, youtube. It attracts and holds dirt, again per youtube.

What does the underside of your MHs look like after several years of using Fluid Film?

I assume that you re-coat at least once per year. Do you pressure wash the underside each year before re-coating?

I have this vision floating around in my head of an overloaded mud ball of a MH driving down the highway. Educate me.

Thanks.
A better expert than me should give his experience here. Since none had done it so far I will anyway give you my own short experience. I have been a RVist for 2 years only.

I don't recommend putting Fluid Film under a motorhome unless you have no other choice. You do it only if you have a big problem.

What is a big problem? For example, in my case I take my motorhome in the snow on december 17 and they put salt on the road. I am in the salt for two hours on december 17 and then on January 19 when I come back in Montreal. Those 4 hours are enough to put salt everywhere under the whole coach, the stairs, everywhere. I then park it in the snow and I do not remove the salt from under since it is freezing. The salt stays there for 4 months. At spring time, the whole underbody has rust everywhere.
I have a friend that parks outside like me but the motorhome does not go on the road at winter. He has no rust problem. Last year after I removed all the rust, used rust converter, antirust paint my motorhome was much better looking than his. But this spring I still had rust everywhere (but not so deep since it was just one winter). So I decided to do what we do for our cars here in the north and I put a antirust kind of grease.

The grease will not drop on the road. It stays on the coach. It stays clear without dirt. If you touch it, it is greasy. After you put it, you no longer want to work under the motorhome. If you do, you get all dirty, your arms, your back, your hairs. It is very bad.

In Quebec province, my sisters and brothers that put antirust under their car can keep it for 12 years without rust.
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Old 05-20-2016, 01:32 PM   #11
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My MH does not look bad after putting fluid film on for 8 years. The choice is rust or oil. I leave when there is salt being put on roads. It will take its toll on items that can rust.


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Old 05-20-2016, 02:23 PM   #12
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Here is the fluid film site check it out: http://www.fluid-film.com/
I used it on my last motor home. If you are never going to drive in road salt I probably wouldn't use it as it will always be greasy and it does attached road dirt. Mostly just dust and light dirt heavy mud wont stick. You will get dirty working under your motor home. But it can be power washed off. I went three years without re coating. still greasy when I sold it. If you drive in road salt I highly recommend it. When sprayed on in doesn't drip. It contains lanolin, no solvent and I think it smells pretty good. Makes your hands as smooth as a baby's bottom!
I have a couple gallons waiting to be applied to my Dutch Star. I didn't spray it before we took a Florida vacation since I ran out of time and it got too cold. Luckily never saw and road salt going South or returning to Ohio. My Dutch Star come from a warmer area, has never been in salt and absolutely no rust. The underside is clean and I have to admit I'm having second thoughts about spraying it but I know I'm rolling the dice and may get caught in a snow storm on one of my winter trips to Florida.
I spray the under deck of my mower too. It does a good job of keeping wet grass from sticking.
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Old 05-20-2016, 07:39 PM   #13
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From what I understand ATF works well for stopping rust. It has a tendency to migrate. But it has to be reapplied periodically. It shouldn't leave a heavy film like fluid film .
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Old 05-30-2016, 06:37 PM   #14
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I have only used fluidfilm on the brake lines and fuel lines on my coach. I used a pc of thin coardboard,bent it around back of lines, then spray line, I then use my hand with a nitrile glove to smear the stuff around the back side of line.I use a spray can,it's easier to move in the tight spots. I keep the under side of my coach meticulously clean and painted,so I would not personally do the entire underside,but I think anyone from canada might want to. I bought my daughter a new car to take to vet school on PEI, after 4 years up there the underside of the car was a mess,I told her to trade it in after graduation. They undercoat cars on PEI but I am not sure what they use,I was told It's some type of oil,but not sure.Maybe someone from canada has that answer .After a friend of mine had a brake line rust out on his 2011 winnebago f-53,I then decided to do my lines with fluidfilm,before that,I had used it on the work truck,the mowers and snowplow.
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