Cheap rust killer

[vintagecarlover]

Check this out for killing rust.

http://youtu.be/TlcL_vHODkc

[kach22i]

I wonder if it's better or worse in the long run as rust usually finds a way to return.

60% Vinegar, 40% water mix.

[nota]

I think rust is alive ie there is a biological action going on
so killing rust is actually what you need to do
and any small bit of rust will regrow

[tharbert]

There's never any really good shortcut to removing rust. If I had to clean up that panel for painting, I'd mechanically remove what I could and follow with phosphoric acid to convert any remaining iron oxide to iron phosphate. Then, use something like DuPont 5718S followed by epoxy or etch primer. There's lost of discussion about rust in the body work forum...

[vintagecarlover]

Not saying it's a perfect solution but being a solution that's wet if small parts are submersed it'll kill rust in areas that a wire wheel can't get to. Hey think about nuts bolts and washers. Chemically phosphate dip and wash and etch primer has got to be better than not getting into areas not hit with sand paper or wire wheeled.

And since when do u buy chemicals that are non toxic and earth friendly for 1.50 a gallon or less in bulk. Any friends who own restaurants could prolly buy a 55 gallon pump top for cheap.

[Alfasrule]

I coat my cars with used motor oil!! Cost nothing except the tarp I use. I use an Old Electric Paint sprayer. It's the only way. I remove door panels, outer panels and trunk stuff and spray everything.

I've used this practice for over 25 years and it STOPS RUST!!!

[vintagecarlover]

Originally Posted by Alfasrule

I coat my cars with used motor oil!! Cost nothing except the tarp I use. I use an Old Electric Paint sprayer. It's the only way. I remove door panels, outer panels and trunk stuff and spray everything.

I've used this practice for over 25 years and it STOPS RUST!!!

That takes the cake. Your THE grand prize winner. I've heard EVERYTZhING now. Omg.

[HarryD]

Molasses is another interesting method to remove rust: How to Remove Rust Using Molasses | Today's Homeowner

No end to good methods. They all have good and bad.

[Ronnie's.930]

Originally Posted by Alfasrule

I coat my cars with used motor oil!! . . .

I've used this practice for over 25 years and it STOPS RUST!!!

Have you developed any troubling, difficult to explain lesions on your person in that time span?!?!

[ClickClickBoom]

Mutations acid, otherwise known as swimming pool acid. Kills rust in seconds and is dangerous to boot, kind of like juggling rattle snakes, total concentration is required, 35 years of use and never been burned, fear works! Cheap and readily available and the steel is ready for TIG welding after drying.

[HarryD]

Originally Posted by ClickClickBoom

Mutations acid, otherwise known as swimming pool acid. Kills rust in seconds and is dangerous to boot, kind of like juggling rattle snakes, total concentration is required, 35 years of use and never been burned, fear works! Cheap and readily available and the steel is ready for TIG welding after drying.

The disadvantage of using Muriatic Acid (hydrochloric acid) is that it eats the good metal at the same rate as the rust. Phosphoric acid (naval jelly, rust mort, ospho, etc) reacts much more slowly to bare metal than it does to rust. This allows you to avoid excessive etching of your good metal.

[hcoles]

The acid based approaches work but remove some good base metal and have environmental and safety disadvantages as mentioned. We tried the chelation approach using Evaporust and later found a cheaper version that you dilute with water. It works and saves the base metal and avoids the environmental and safety issues. I've read a molasses and water mixture has been used and works by chelation.

[Alfasrule]

It works for me!! It's CHEAP and effective. I've had some ALFA's for over 25 years and I oiled them and NO RUST. I've never had to bring my cars to a Body Shop. It's a dirty job, but well worth the effort.

[tharbert]

One not mentioned yet: Oxalic acid. You find it in tea. It's also the main ingredient in Bar Keepers Friend. It's another chelating agent: doesn't reacted with iron, only rust. It's much more potent than vinegar/acetic acid. It does great removing rusty brake dust from chrome or alloy rims. If you have a pesky black ring where you sat your beer on that nice oak trim, it will remove the ring stain. Brew a strong batch of tea and throw some rusty bits in it.

[jlex]

Be very careful with the used oil spray: the contaminants contained in that used oil are carcinogenic. It's done a lot here in NW PA. The guy up the road did it as a business and I would cringe to see him applying it with a spray gun without a mask. He died of lung cancer a few years ago. Not saying it's not useful; just protect yourself with a good cartridge-bearing mask.
Makes a heck of a mess underneath the car and is miserable to work on afterwards. Didn't seem to help much with the Jeeps I've owned over the years, although they may have gone to hell a little earlier without it. My solution: stick with Volvo or BMW which seems to have a higher quality steel and is better winterized. Not a bit of rust on my '88 Volvo!
I like to use Fluid Film instead: comes in spray cans & gallon cans. Is lanolin based & is safe & clean to use. Check it out as a transition away from used motor oil please.

[jlex]

When I cleaned up the floor of my '70 VW bug, I used a wire wheel first, then sprayed it down with phosphoric acid. They sell it by the gallon at Home Depot. After it did it's job, I cleaned the residue with denatured alcohol. Applied silver primer & 2 coats of POR15 to finish the job.

[Charles Freeborn]

Vinegar is simply an acid. Next step up in strength is Muriatic acid - get it at home depot - it's used for masonry cleaning. When cars are "dipped" to remove rust it's an industrial version. You'll want to neutralize afterwards (baking soda).
Best spray on rust preventer is LPS 3

[Alfasrule]

Came up in the ALFAbb today!!



https://www.ncptt.nps.gov/blog/comparative-study-of-commercially-available-rust-converters/

[TheSt|G]

Originally Posted by Alfasrule

I coat my cars with used motor oil!! Cost nothing except the tarp I use. I use an Old Electric Paint sprayer. It's the only way. I remove door panels, outer panels and trunk stuff and spray everything.

I've used this practice for over 25 years and it STOPS RUST!!!

These cars are pretty good at coating themselves with used motor oil.