What paint/treatment for rusty chassis

[scbk]

Just wondering what paint/rust treatment people are using for painting underneath vehicles, chassis etc.

 

We're not talking classic restoration here, just old workhorses that you want to get a few more years out of.

Ideally brush applied as it's the lazy "slap a bit on at a time" option

 

Have used all sorts over the years but not really sure what keeps the rust at bay best

 

Waxoil

Hammerite type all in one paint

Red oxide primer

normal gloss

Bitumen paint

Underbody sealant

Vactan (rust converter)

Stonechip paint

 

Have also seen tins advertised as "chassis paint" ie : https://bearmach.com/black-chassis-paint-5l-ba-4692?glCountry=GB&glCurrency=GBP&gclid=EAIaIQobChMIx7r4___25AIVTbTtCh34zg72EAQYASABEgKN2_D_BwE

 

 

 

Searching online you get more reference to classic cars and 'no expense spared' paintjobs, not what I'm after 

[billpierce]

I used metalmorphosis and waxoyl. Seems to work ok and not to hard to apply. Id really suggest get waxoyl gun for a compressor. Means you can blat it on thick and get it to all the nooks and crannies in a fraction of the time. I just got a cheapo off ebay and worked well. Have to heat the cans it hot water though

[Stubby]

Waxoil here .

[Peasgood]

8 hours ago, billpierce said:

Have to heat the cans it hot water though

Don’t heat with the lids on!

What a freakin’ mess that makes!

 

I read some time back that regular (once or twice a year) spraying with waste oil was best as far as rust goes. I think if I was doing it I would use new though. 

[TreeswingerPerth]

I paint mine with stuff called Rust Bullet ( Black Shell ), best I’ve ever used by far . Then a heavy coat of waxoyl on top and inside . My Land Cruiser lasted 20 years and still looked mint when I sold it .

[Ferguson system]

On bare metal and chassis, I use owatrol oil as a primer with enamel paint mixed with owatrol oil on top.

 

 Underneath, I would have sprayed it with linseed oil first, let it dry and black waxoil on top.

 

 

[tree-fancier123]

I've been using the Vactan rust converter, then a 2 pack epoxy mastic (Jotamastic 87). I got the idea of epoxy mastic from Arbtalk someone mentioned it, then I googled it and saw Rustbuster used it to treat a Ranger for the RNLI

 I figured they had the choice of products, so there must be good reason. Rustbuster seem to have made a trade out of it and their prices - if I paid myself what they had wanted, could have gone on holiday anywhere.

https://www.rust.co.uk/product/rusty-s-technical-details-em121-epoxy-mastic-326

Jotamastic 87 was cheaper ebay than Rustbusters version

I've only brushed it on, not messed about buying the proper thinners for it to spray it. There is summer and winter hardener, the winter hardener the paint goes off too quick if its warm.

Edited September 30, 2019 by tree-fancier123

[scbk]

10 hours ago, Peasgood said:

I read some time back that regular (once or twice a year) spraying with waste oil was best as far as rust goes. I think if I was doing it I would use new though. 

I've a friend who like to do waste oil then chuck sand at it. Wouldn't fancy working on one of his vehicles

[Ratman]

Few of my mates with 4x4,s use “u-pol raptor paint” its good stuff and takes abuse well, then spray over top again with clear waxoyl.

[marne]

Owatrol every year.