Rust prevention inside doors?

[MrGoodpliers]

I'm the proud new owner of a very solid western suburban. I was wondering if anyone could give recommendations on what to do inside the doors to keep them from rusting in my wetter climate. I would prefer a simple application without having to dip or blast the doors. I'm thinking of Eastwood's corroless paint or por15. Any ideas or opinions?

[krue]

ebfabman had a trick using a garden sprayer modified to spray something (I don't remember what) inside doors. Maybe drop him a pm?

[JAKES 68GMC]

I dont know if this will help you, but on my truck the original owner drilled a hole on the inside of each door. Pop the plugs out an squirt oil, spray grease, whatever. Also did that for the bedsides, and my truck is pretty much rust free. Hope this helps.

[4x4Poet]

If you are disassembling the door innards, get in their with a wire wheel, wire tooth brushes, and whatever else will remove the rust. Then clean, dry, maybe convert the remaining rust with zinc phosphate & dry, and then paint or POR15. I prefer brushing on grey POR15 for the inside of the doors because it is a great barrier to moisture (moisture curing) and the grey color keeps a little light reflecting ability so the inside of the door is not dark as with black paint. Brushing gets in the crevices better. From what I've seen, GM did not paint the inside of the doors unless as overspray.

[jhow66]

Just wash out the inside of doors and let dry. Use spray on undercoating in spray cans.

[wolfthing2000]

I think the garden sprayer idea with an anti corrosion spray like Gibbs, Corrosion X, LPS 3 or such should work real well. I plan on painting inside with a rust encapsulator and then spraying down with the above mentioned.
A friend I work with at the helicopter repair station (both of us long term aviaton) said some manufacturers use linseed oil sprayed inside of box and round steel tube when used in aircraft for a corrosion inhibitor.It might be worth a try. Lindseed oil is not anywhere near 100 a gallon like some of the other "name" stuff out there.

Just some of my ideas for ya.

[wolfthing2000]

On the same topic, I remember hearing some people spraying hot oil mixtures under trucks and back into body panels with supposed good results.

Might get a little messy around the carpets and such.

[Botietruck]

When I had to replace my door bottoms, while it was wide open I blasted the inside of both doors. But if you are not doing that, I would clean it very good with wire brushes, 80 grit paper or anything else you can get in there.
Now, after I blasted mine and welded in the new door bottom I used an epoxy primer and used a small paint brush and brushed the entire inside of the door. The next product I used is called Gravitex. It's the stuff body shops use to spray rocker panels and other areas to protect the surface from gravel chips. It's thinner than undercoating and it dries rock hard. It comes in a 1 liter bottle and it can be applied with a special spray gun that the supplier sells. I bought a case of the stuff ( about 6 bottles) and they gave me the gun free. A case is about $75.00. The spray gun has a long tube that will allow you to get it in all corners of the door by going through the window opening, the latch openings and the holes in the inside face of the door. It really does a great job. Just make sure you do not block the drain holes in the bottom of the door.

[bucket]

i like to use waxoyl on my classics.

[4x4Poet]

Hmmm...

I've seen a few methods here I hadn't heard of before. I still like my method, but ...(pondering, pondering)

[wolfthing2000]

I asked my friend about the lindseed oil thing again, and he said they were engine cradles for Cesna, chrome moly tubing weldments with an access hole for filling and draining the lindseed oil out and then the hole was plugged with a cokld swedged in barbed fitting.

This was an FAA requirement! The stuff must work.

[72MARIO]

Kwown or Rust Check. They are the best. Oil sprays avaible

[jimfulco]

I've heard of people spraying used motor oil inside the doors every year, but I've never tried it.

[wolfthing2000]

Some of these ideas actualy sound like they would work. I think the biggest problem with doors and most rust prone panels . ,, is the nature of design, the overlaps of steel an spot welds make for a hidden spot for moisture to collect and probably were void of paint from day 1. I personaly use the Ospho , Metal ready or such and let it drool down into all of the crevices. Then seal it up the best you can with an encapsulator.
Others probably have better ideas, I enjoy hearing them.

I am in the process of closing up repairs on a rocker panel and plan on leaving a hole to spray the lindseed oil into . I would love to encapsulate the inside but it would probably kill you to weld metal with this stuff on it.

[Gazoo]

I agree with several of the above. Remove all loose rust and then apply an oil based water repellent. Rust Check is the best I know - it will literally crawl into any crevice and keep moisture out of the most damaging spots while maintaining its liquidity. I would avoid any type of solidifying undercoating as many will actually create moisture pockets if not maintained regularily.

[wolfthing2000]

Rust check huh? I'll Google it. I haven't heard of this one yet.

[smokekiki]

I would stay away from the used motor oil.Who wants to smell that !

[67ChevyRedneck]

Remove all the rust the best you can. I'm going to coat the inside of my doors with eastwood's rust encapsulator. My doors are brand new, but it should work well for you. Googe "eastwood rust encapsulator" and another product called "zero rust." They are both supposed to be really good.

[wolfthing2000]

RUST bULLET

[bucket]

When i use waxoyl i warm it and mix 50/50 with clean motor oil. the oil helps the waxoyl creep into existing rust. the waxoyl stiffins slightly and creates a waxy barrier robbing rust of air and moisture (what it needs to survive). don't use used motor oil. it contains impurities which can promote rust (or so i've been told).