Rust converter

[loncell]

I'm after just a smallish tin rust convertor that will convert rust to a black tough coating (not paint rust converter)
It's for the front springs on the car
Which is best ? I'd prefer brush on with it been a bit awkward rather than spray
Cheap been the operative word here
Thanks

 

[Ferret.]

Can not help you with cheap, ive tried a lot of rust convertors as i restore old motorcycles .

I use this stuff always gave the best results.

Deox-Gel - Bilt Hamber

 

[rs500nutter]

Hmm the dreaded rusty coil springs 🤣 once they start rusting its a nightmare to keep um looking tip top. Will be an awkward job cleaning them up in situ and probably wont be able to do a complete job without removing the whole strut to gain a 360 application around the spring.
This is probably as cheap as it gets but dont expect miracles im afraid.

https://www.googleadservices.com/pa...qJO99duGAxUyefEDHcrjBYYQwg8oAHoECAYQDA&adurl=

 

[sandra51]

See if you can get hold of some 30% or higher phosphoric acid then you can simply brush it on and be left with matt black iron phosphate.