Removing rust/Treating/Painting underside of car

joem83 Posted hell of a lot Posts: 7,039	Removing rust/Treating/Painting underside of car joem83 @joem83
	Apr 21, 2024 14:54:04 GMT Select Post Deselect Post Link to Post Back to Top
	Afternoon all, My "new" daily has quite a bit of surface rust under the back end. Still at the point where it's only surface rust, but I reckon another winter and it will need welding if left. My thoughts are, pop the rear wheels/suspension/bumper off and wire wheel all the rust off (most likely the nylon wheels), treat the metal, and then apply some kind of undercoat/bed liner type product. What products actually work for this? Rust stop/rust converter/sealer?/stonechip or bedliner paint. I don't want to go full 80's and just cover everything in tar type stuff lol.
	Last Edit: Apr 21, 2024 14:56:29 GMT by joem83 1991 Mk2 Golf 1.8t 20v - Project Modus Operandi: 2) If you haven't got something constructive to say, say nothing

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bmw2101 Part of things Posts: 905	Removing rust/Treating/Painting underside of car bmw2101 @bmw2101
	Apr 21, 2024 20:44:36 GMT Select Post Deselect Post Link to Post Back to Top
	well thing is, if you use these bed liner coatings, you need it to be really good as in no wax or grease on anything, all keyed surface etc. I have a R100 metro, i tried to get as much scabby stuff off as i could, then i mixed 20/50 and waxoil, and coated the life out of the underside. Now, the idea is, the oil seeps into all the places i cant get to, and the waxoil provides a longer life coating. I plan to do this every year, and the reason i went this was is of lakeside auto body - jerry, did a vid on repairs he did many years ago, and how he uses used engine oil, or on doors he uses wd40. click here that not the vid i wante dto show but you get the idea. hth


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kevins Posted a lot Posts: 4,701	Removing rust/Treating/Painting underside of car kevins @kevins
	Apr 22, 2024 12:50:22 GMT Select Post Deselect Post Link to Post Back to Top
	I've got something very similar to do this summer (2010 fiesta) my plan is clean it all back with wire wheel or similar, treat with converter then go over it with something like Bilt hamber UB, I use a 50 50 mixture of clean engine oil and waxoyl in box sections, its preseved a TR7 for the last 30 years.


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dodgerover Posted hell of a lot "These days turned out nothing like I had planned" Posts: 5,882	Removing rust/Treating/Painting underside of car dodgerover @dodgerover
	Apr 26, 2024 18:17:39 GMT Select Post Deselect Post Link to Post Back to Top
	Treat the rust with something phosphoric acid based after cleaning most of the rust off, then paint with chassis black, finish off by lathering it in some sort of wax underbody treatment
	Mk2 lwb transit work van retrorides.proboards.com/thread/159214/new-work-1985-transit-update Dodge 50 (247CUi) powered Range Rover (resting), WANTED Aussie Valiant

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