SkyPilot
Full Access Member
Eastwood Products makes some great under chassis paints. Then I would apply ACF-50. I made several posts about how we use it on aircraft and it works fantastic!
Rear Diff Rust/Warranty Question
- Thread starter Farva5803
- Start date
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Syberspace
Full Access Member
Same here. I put POR15 on with a brush and covered the axle and diff. I used semi gloss. Looks like factory.
You can paint right over the rust. Just wipe it down with a solvent first.
TXRaaptor
@thebeardedbrand
You can spray with Rustoleum then coat with fluid film and you’ll be good. Had to do it with my Gen2 in the same scenario. Came from a Tundra, so was surprised at the surface rust as Toyota done a great job treating the frame.
Dealer told me it was cosmetic and “completely normal” but I couldn’t deal with seeing it like that on a high dollar truck so done it myself.
Easy job and it’s still going strong under there. You can reapply fluid film every year, or as you see fit I guess?
Badgertits
FRF Addict
Wire brushes, scour pads, compressed air/leaf. Blower, microfiber cloths, rustoleum extreme semi-gloss black, & Amsoil HDMP - wool wax & fluidfilm suck they need to be reapplied all the time & rub off on everything.
Hit the axles/diff up w/ the wire brush & pads, use air to blow off as much rust dust as possible, wipe down w/ lightly moist towels to ensure there’s nothing left- let it air dry and/or use compressed air/leaf blower. Use some paper trash bags/plastic wrap/tinfoil/old sheets etc to cover up whatever you’re concerned for overspray (or just be careful & take your time) give everything 1 light coat followed by a heavier 2nd coat, in a couple days if it’s still dry out then you can go over the painted parts (and everything else under there) w/ a couple coats of the Amsoil HDMP - it goes on runny but dries to a semi-tacky semi-permanent coating, best I can compare it to is beeswax. It’ll “attract” dust when it’s really dry out, but everything washes right off w/ garden hose. Is a must if you’re in a state that uses salt brine on roads or near ocean/launching boats etc
You can do this in a weekend for relatively short $$$ just plan it out when it’s gonna be dry for a few days.
If you look around in the gen2 forum I have a thread w/ pics of me doing as I described above on my 2018 (which had no rust but I just had opportunity to Do this before winter hit so I did)
My 2020 actually had a couple spots too & I did the same but didn’t need to post about it lol. Take a look @ how the frame looks after pressure wash & this kind of winter abuse- see how the water just beads on the frame?
Hit the axles/diff up w/ the wire brush & pads, use air to blow off as much rust dust as possible, wipe down w/ lightly moist towels to ensure there’s nothing left- let it air dry and/or use compressed air/leaf blower. Use some paper trash bags/plastic wrap/tinfoil/old sheets etc to cover up whatever you’re concerned for overspray (or just be careful & take your time) give everything 1 light coat followed by a heavier 2nd coat, in a couple days if it’s still dry out then you can go over the painted parts (and everything else under there) w/ a couple coats of the Amsoil HDMP - it goes on runny but dries to a semi-tacky semi-permanent coating, best I can compare it to is beeswax. It’ll “attract” dust when it’s really dry out, but everything washes right off w/ garden hose. Is a must if you’re in a state that uses salt brine on roads or near ocean/launching boats etc
You can do this in a weekend for relatively short $$$ just plan it out when it’s gonna be dry for a few days.
If you look around in the gen2 forum I have a thread w/ pics of me doing as I described above on my 2018 (which had no rust but I just had opportunity to Do this before winter hit so I did)
My 2020 actually had a couple spots too & I did the same but didn’t need to post about it lol. Take a look @ how the frame looks after pressure wash & this kind of winter abuse- see how the water just beads on the frame?
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gkrane
Full Access Member
Badger that looks really nice! I haven't had to re-apply the woolwax all the time, just maybe twice a year and the touch up takes 15 minutes and I live by the coast.
Badgertits
FRF Addict
Well in all fairness it’s been a while since I tried that or fluid film but that was my biggest gripe on both (fluid film especially seems to just rub off & this Amsoil stuff….you basically can’t rub it off) & I’ve also used this daubert chemical co stuff NOx rust x-121B but while not runny/easily wiped off it does kinda & dry out “flake off”. Amsoil stuff been best I’ve triedS far as DIY goes (also really like Yamashield from yamalube for bare cast aluminum & the engine Bay Area, safe on electronics etc
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gkrane
Full Access Member
Yeah Fluid film for me is a great product just not for an undercarriage IMO. Its just rubs off too easily. Woolwax hit the mark for me for durability and ease of application. 100% of my off road driving is on the beaches of South Texas during fishing trips as well.
Fireguy144
Full Access Member
You don't get any overspray ? Seems to me , that it would get all over..
Thanks.
gkrane
Full Access Member
No I did not get any overspray at all.
