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#4550676 - 10/22/17 01:28 AM under chassis clean wash
bmwjohn Offline

Registered: 01/04/08
Posts: 728
Loc: indianapolis in
Hi: thinking about manual pump sprayer with vinegar water mix aimed at truck frame and related, with moderate rust. Will this neutralize the rust? Then spray with power washer, than just bought a sprayer with fluid film and spray? Overall leave it clean and dry, then rust resistant? Thoughts?

#4550691 - 10/22/17 02:40 AM Re: under chassis clean wash [Re: bmwjohn]
Oro_O Offline

Registered: 09/20/14
Posts: 1352
Loc: Seattle-ish, WA
If it were a fungal infection, a vinegar douche applied periodically would work. For rust, no.

Get under and scrub it with a wire brush and then try to de-grease as best you can. Then hit it with a rust converter spray. The Rustoleum brand one is very affordable at Walmart.

This is going to blow away a very weak passive neutralizing spray and then wax coverage, and really not be that much harder and likely less expensive given the silly cost of FF.

#4550724 - 10/22/17 05:48 AM Re: under chassis clean wash [Re: bmwjohn]
SilverSnake Offline

Registered: 05/29/13
Posts: 592
Loc: Florida
Power wash undercarriage and let dry thoroughly. Apply S-100 Corrosion Protectant. Will STOP rust completely and make the frame look much better. Is a clear spray.
2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PUP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)

#4550741 - 10/22/17 06:38 AM Re: under chassis clean wash [Re: bmwjohn]
4WD Online   confused

Registered: 09/21/10
Posts: 6431
Loc: Texas

#4550797 - 10/22/17 08:36 AM Re: under chassis clean wash [Re: Oro_O]
camrydriver111 Offline

Registered: 07/01/14
Posts: 1488
Loc: Canada
Originally Posted By: Oro_O
If it were a fungal infection, a vinegar douche applied periodically would work. For rust, no.

I think he wants to use the vinegar to remove salt.
BITOG or: How I Learned to Stop Worrying and Love the Extended OCI

#4550935 - 10/22/17 10:42 AM Re: under chassis clean wash [Re: bmwjohn]
Donald Offline

Registered: 03/21/04
Posts: 20472
Loc: Upstate NY
You just need to get major dirt off the vehicle before using FF or CarWell. At the shops they just use compressed air. It will soak through whatever is left after cleaning with compressed air.
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)

#4551139 - 10/22/17 03:24 PM Re: under chassis clean wash [Re: camrydriver111]
bmwjohn Offline

Registered: 01/04/08
Posts: 728
Loc: indianapolis in
supposedly vinegar counteracts rust. I have tried it on small metal items and it helped, but don't know what it does if left on.

#4551227 - 10/22/17 05:38 PM Re: under chassis clean wash [Re: bmwjohn]
DBMaster Offline

Registered: 09/18/12
Posts: 5323
Loc: DFW
Here's an extreme vinegar rust removal soak. Apparently, the guy forgot about the tools he was soaking for 19 months.

#4551231 - 10/22/17 05:41 PM Re: under chassis clean wash [Re: bmwjohn]
StevieC Offline

Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
I never wash the underneath of my undercarriage for the life of the vehicles because it gets sprayed with rust proofing spray yearly. 20 years and 1/2 a million kilometers later no rust. smile
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)