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Re: Is Cosmoline closest to GM frame wax? [Re: LeakySeals] #5111627 05/21/19 06:31 PM
Joined: Apr 2012
Posts: 2,924
buck91 Offline
Joined: Apr 2012
Posts: 2,924
I used the Amsoil HDMP on my F150 the first winter after buying it used (with very low miles) a number of years back. Truck was basically rust-free before winter. After winter it had developed some very light surface rusting along the edges of the sheet metal in many places.

I switched from HDMP to Fluid Film and have had excellent results- but it does get reapplied yearly now.

2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: Is Cosmoline closest to GM frame wax? [Re: LeakySeals] #5128315 06/08/19 06:43 AM
Joined: Nov 2006
Posts: 22,426
Trav Offline
Joined: Nov 2006
Posts: 22,426
Next time try Noxudol.

ASE L1, Master. Deutsch Meisterbrief.
Re: Is Cosmoline closest to GM frame wax? [Re: LeakySeals] #5210272 09/11/19 03:44 PM
Joined: Feb 2011
Posts: 7,365
LeakySeals Offline OP
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Joined: Feb 2011
Posts: 7,365
Update: Its been approx 10 months since the first application of RP-342. Including one winter. The rear wheel wells and everything in the area are the trouble spot for rust on this truck. Nothing rinses off under there. As stated before, my prior Fluid Film habit hampered the first application. Lots of oily soot, sand, and grit flaking off in chips exposing areas of rust underneath. Would appear its still an issue.

One area that still has minor FF flaking off. Still has soot clinging to the body. Same for the other side.

[Linked Image]
[Linked Image]

For the most part, the RP-342 held up pretty well. Used a pressure sprayer on low to get anything loose and reapplied. Decided to leave the rusted surface metal bare and coated it with nothing but RP-342. See what happens next year.

[Linked Image]
[Linked Image]

In summary there were a few spots that chipped off and some minor rust bled through, and thats probably my doing not getting all the FF off. But this time around was fast. Other than these areas the frame and undercarriage is clean.

I didn't reapply everywhere. The rear still holding up from the original application. Going to leave it alone.

[Linked Image]

06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k ST HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
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