New-to-me purchase. Looking to protect the frame.

I use whatever I’m greasing the u joints with. I use nlgi #2 moly grey in colour to match the frame

 

Did you use the zeibart shop on Lyell Ave? I've been told it depends which shop you use for zeibart, as some do a better job than others. I just brought an 03 from New Mexico to NY, super clean underneath and had the Canandaigua shop do it. I suppose you could always just scrape it off and coat it with FF

 

The guy with the Fluid Film on his truck in MA is a hero! That truck looks amazing. Given my not so great skills, I took my car to the folks at Rustoration. They used to be in NY and are now in CT. Might be worth a drive -- the whole thing takes about two hours. I dropped my truck off, got a ride to a nearby diner and had breakfast. The person runs the company out of a very nice garage and is an expert. I know that is a bit far from where you are but could be worth it.

http://rustoration.com/about-us/

Notice the products he uses. This is what I had put on my 2005 Tacoma (after the frame replacement). Looks and works great:
https://nhoilundercoating.com

Hope that helps !

 

If these trucks were as easy to take off the frame as vw bugs are, i would do it and galvanize the frame. There is a tank near me that can do truck frames. A bit spendy st $800 but worth it.

 

That looks awesome!

 

I do routine touch ups on mine but I like to really hose it down in the Summer when it's nice and hot.
It creeps better then. I also spray up into the weep holes in my doors, and rocker panels.
I still have the stuff seeping out and creeping up the outside of my doors from time to time. I actually like to see it making it's way up the outside of my doors. That tells me it's also creeping into the small spaces inside.
Before it was trendy, I used to WD-40 the frame and rockers on my old 1998 T-100. My nephew is still driving that truck and it should be pushing about 300,000 miles now. The frame is good and the rockers and cab corners are solid. I never thought to spray up into the doors though and they are rusting out on the bottom now.
I've rectified that on my Taco and will continue to do so every year.
I even follow up on the rockers and doors with some WD-40 on occasion to keep the FF moving. You don't want those drain holes to clog up, and they are small.
Fluid Film is great, but just about any spray oil will be a HUGE improvement over nothing.
My welds start to show a little rust so I wire brush them and hit them with a little Rust Oleum a few days before my FF refresh.

 

I would:

-buy air compressor needle gun and hit anything flaky.
-rust neutralize anything else minor (I used naval jelly and then wiped everything down with alcohol)
-then use rustoleum/ por 15 over any bare metal
-then fluid film or other product

my only gripe with fluid film is that it attracts a lot of grime- tire shop freaked out and called me and said “your whole truck is covered with something oily”. I know the machine protectant a soul/ Eastwood products go on more like a dry wax, so that may be a way to go. However, fluid film seems really effective- I can see all the salt/ chemicals being shed from the frame back onto my driveway. I always park in the same spot and there is a truck shaped salt outline from where all of it has been repelled by the FF and no evidence of the white/ dried salt lines that you usually see.

 

I 2nd the idea of spraying in the door weep holes. I also got to the areas I could access inside the tow hitch, rear bumper, bed side access pockets, body access holes, and the front fenders (especially the area down low by front doors where leaves, dirt, and pine needles accumulate and hold moisture- just open your front door and push the little rubber cover away from the bottom of fender)

 

I used MavCoat Steel Shield yearly. Cost more but not as messy as Fluid Film. So far so good.

 

The original coating was done through Dorschel Toyota and all of the re-sprays by Canandaigua. The worst part of the experience (other than the crap product) is the non-stop pressure for more services every time you take it in for a re-spray. They're absolutely relentless - even when I get nasty.

Here's the straight scoop. Properly applied undercoating can prevent some rust, but not all of it. And no rubberized undercoating will stop rust that has already started. That said, what Ziebart does is cover up any rust that does occur every year with your "free" re-spray. This doesn't stop the rust that's started, but instead hides it from view. Worse yet, layer after layer of the product traps moisture which just causes more rust. But most folks won't know it because its hidden from view. Nice racket!

 

I have been using FF for 6 yrs now, once a yr and have no rust. The new stuff is wool wax, same lanolin protection but thicker, so it doesn’t wear off as fast, less smell than FF and no over spray. After my gal of FF is gone I will switch.

 

I used cosmoline. Pretty happy with how it’s holding up. It has an odd smell that goes away in a few days but it’s not offensive like ff. Cosmoline RP-342"Heavy" Rust Preventative Spray (Military-Grade) 3-Cans

Cosmoline RP-342 "Heavy" Rust Preventative Spray (Military-Grade) 3-Cans

https://www.amazon.com/dp/B01MRRYDMZ/ref=cm_sw_r_cp_api_i_zYctEbXY5ZNQ1

 

Here in maine we go to Rustcheck. You have it applied once a year and it stays tacky to the frame and coats it. my father did this for his truck 6 years later, 115k miles, he sold the 13’ with no rust on the bottom. The dealer was amazed at the condition. If you coat once a year They guarantee no rust or they will have it repaired for free.

 

Woolwax has kept mine protected here in salty old Wisconsin. I get the black dyed version and spray it on myself, looks great and keeps the rust away. Fluid Film is good too as others have said.

 

Fluid Film, Woolwax, and cosmoline products, I've used all three. Sprayed it in the door weep holes, rock panels, and any other cavities I saw while spraying. I have a bulk sprayer but because I don't have a lift I find aerosol cans with the 360* extension easier. This last summer when we had a string of 95* to 98* days I had the rust preventative dripping from my frame cavity so I know it's in all the crevices. If you have surface rust FF or Woolwax seems to work best. If new or no rust the cosmoline products seem to be the way to go. I bought my truck used with a frame in pretty good condition, some surface rust, with the exception of the receiver and I'll have to replace it soon if I want to tow anything. A lesson I learned back in '87 is not to use anything that dries hard as a rust preventive, it will only crack and collect moisture.

 

You may want to add an extension to your air conditioning drain so it drains around the right frame rail instead of on top of it.

 

Has anyone had any experience with Milspray in Lakewood, NJ. They use Tectyl Undercarriage Coating

https://www.milspray.com/corrosion-prevention-compounds

I was planning on using my friends lift and spraying it myself with wool wax and always do my own maintenance, but I’m not sure I want to deal with the hassle.