Is fish oil better than rust converter/primer for treating rust

Fish oil is a preventive cure and stops rust forming in the first place, it will not fix already rust metal.

Rust converter converts rust into iron oxide that stops further rust forming but you still have to seal the metal as the ajoining metal around the treated aera will start to rust.

Primer will not usally seal the metal and rust will form under the primer.

Most rust converters can be painted over.

Metal can rust at differant rates due to the composit of the metal itself.

Regards Richard

Use the lot buuuut rust WILL always come back I fixed up rust on my camper using firstly rust converter then fish oil than primer then killrust paint then paint. Did a pretty good job but i had to touch it back up with a bit more removal a few years later

I once owned an Italian sports car, which, if you were quiet, you could hear it rusting. There were pockets like door skins and boot lid, where you couldn't get in with rust killer and scraper. I sprayed fish oil in, allowed it to seep right into the seams and the rust, and it seemed to stop the rust in its tracks. (I owned the car for over 30 years).
If you have accessible surface rust, then sanding back and treating first with rust converter, then with a proper rust-proofing primer; eg, zinc-rich, it is better.
Gerry

HI Loris,

Consider using PENETROL.
It penetrates rust spots and also is a conditioner.
Drys hard and glossy - can add more to final paint for extra protection.
I have used fish oil but find it always stays tacky - and thus gathers dirt and grime.
I started using penetrol a few years ago and found it the best.
Cheers,
Glen

i once sanded a car, used converter, then kill rust, it came through again within months. killrust is a worthless product, its just paint! So anyway I got onto penetrol called the manufacturer and used it, it is the most effective product i have seen. So I did a test 2 yrs ago. I have an old boat trailer, the rust is flaking right through the metal, you know when the metal completly thickens up, its the worst kind of rust. I did no prep and just painted it right on and thats it. 2 yrs later in full weather i cant see any rust coming through. So now all I do is paint on penetrol and then top coat with anything and thats it. BTW dont use the clear penetrol use the aluminium one, it has microscopic flakes of aluminium and layers the metal with it. There is a similar product called ormonds silver shield and now because this stuff is so good I have noticed dulux has followed with one.

loris G

I have used a product called Firtan, its a rust convertor. Remove flaking or powdery rust, dont clean back to original metal, coat with this stuff as per the directions. I have used this product and have been quite happy with the results. Yes it can then be painted over. No I dont sell it.

Cheers Pop

Our gutters are under a tree and they always have water standing in them for ages after rain.

When I found that the zinc had disappeared there and the rust had started I
1. wire brushed the rust off
2. painted with zinc/cold galvanising paint
3. painted with bituminous paint.

Ten years later that gutter is still rust-free - I can't aske for better rusting-resistance than that in a very wet area.