Frame Protection and Rust Proofing

Find a local dealer for NH Oil Undercoating. It's just like Krown or Fluid Film and I had my Tacoma sprayed with it a couple of months ago to protect the new frame. Cost me $160 which I gladly paid so I didn't need to deal with the mess myself.

 

It’s really not a mess after you do it a few times. You just need to actually do it,then you learn. It Takes me now about 45 min. and that includes setting up my pancake compressor. lowering the spare tire and getting in that area under the spare tire. I use a undercoating gun, buy it by the gallon. My cost now since it’s a routine is less than $20 a year. Check what it cost a gallon of FF on Amazon. A gallon last me 3 yrs.

 

Fluid Film is awesome, I have been using it for several years. Using 2 or 4 or even 6 cans of Fluid Film on your truck is almost a good start. When your looking at your truck and you start seeing a little rust just starting you can be sure there is 100 other places rust is starting you can't see. You need FF, it will creep into the other 100 places and then some and stop rust or prevent it. But you have to use enough to do the job. Don't use it when it is cold it just sits on top and will not creep, it needs to melt so to speak. You can use FF on everything but brake pads and interior, will not hurt paint and keeps wiring from corroding. FF has no petrol products in it, will not swell up rubber. I know some of you guys wish your rubber would swell up more but that is a different problem LOL. The most important places to get are inside the frame, you get more rust inside the frame than outside. Water and salt get inside the frame. Water evaporates salt will not, then when you drive down the road in a summer rain thinking you have nothing to worry about. the salt that has been trapped in your frame for a year is reactivated and eating when you least expect it.Thats why you need FF. I worked construction for over 35 years, In that 35 years I built 5 or 6 Car Washes. Every one of those Car Washes RECYCLE the water. The water is ran through a filter but it do'es not filter out salt. So when you go to wash your truck, it blasts the under side with salt water. Actually most car washes don't give you clean water untill final rinse. Thats why you need FF. Sorry I was so windy must this Crown Royal Black Label.

 

Question for those that have used FF: I applied it for the first time on my '14 a couple of years ago. After moving to another part of the country last year and experiencing my first winter with the truck (where they used an infuriating sand-salt mixture on the roads), the entire undercarriage of my truck is covered with the sand/salt mixture because it stuck to the FF. Everything looks completely dirty and I'm not sure whether I need to try and remove the FF and re-apply or what. Alternatively, do I apply FF again OVER the existing layer and forever trap the sand/salt that's already stuck on there?
Here's what it looked like a few months ago (I've since pressure washed everything but it only knocked off the loose/big pieces of sand and salt):

 

If you still have salt stuck on now, yep I would use a hot soapy mix and spray it on. A hot pressure washer would work good. FF will come off pretty good with hot water and some pressure.

I would reapply FF when it’s warm out so the FF could do what is does best and creep into the nooks and crannies of hard to reach places. Lower that spare tire and get there good also.

Durning the winter when you get more salt on there, use the garden hose when it’s above freezing to wash the undercarriage the best you can. I use just a garden hose with light pressure. You don’t want to blast off the FF.

On a regular basis I only apply in the late summer in preparation for winter. I don’t wash off the old FF, I just reapply over the old. You have to keep up with this maintenance every yr.

I use a compressor and undercoating gun, but will touch up spots with a rattle can.

It’s easy to do and well worth the 45 min task once a yr. I’m rust free.

 

Just to clarify -- you think I should strip off the current FF and apply new in a few months while it's still hot?

 

If you can see white salt in the FF then yes remove it. If it’s just dirt and grime,No, just reapply FF.

Dirt and road grime will always stick to FF and eventually wash off. That’s why you need to reapply yearly.

But if my frame had white road salt on it, and I knew it was road salt, I would try to remove it.

 

No rust in that picture. Thats why I use FF. The bottom of your truck is going to get dirty!!!