Join Date: Sep 2014
Location: Black Diamond, WA
Thanked 284 Times in 244 Posts
iTrader Score: 0 reviews
Honestly, I'd give everything underneath another coat of paint first. Black on everything but the body panels.
Then consider doing an undercoating. But the most important part of that IS doing inside the doors, frame rails, etc.
Depends how much salt you're seeing. Couple trips up north during the winter is not a big deal compared to daily driver in the salt belt. Keeping paint chips touched up and good mudflaps will do alot for the body.
I could see doing the internal parts with something like the Eastwood coatings if you want to be OCD about it (not a bad thing), but I would NEVER oil coat something I had to work on unless it was going to be a rust belt driver.
How long you plan on keeping it?
14 years old, the 07 in my sig, spent the first 4 years and over 50% of the total miles in the CO mountains daily driven EVERY DAY in the winter on sanded and salt/mag roads and highways. Including several road trip back east in the winter. Truck is black paint but was white for months at a time seemingly days after washing it.
Since then, it's done 2 winters in Anchorage AK as a daily driver and the rest here in Seattle, with trips to the salty side of the state in the winter with the snomachines.
It has zero rust and I've painted the undercarriage a few times, never done in the doors/frame fenderwells, etc.
I understand you want to protect your investment, but consider yourself or the poor sob who has to crawl under it and paint/coat everything with something that isn't an oil coating unless you need to, IMO.
07 5.9 Mega, G56, SB Single disk Ceramic clutch, OE 1 piece Al driveshaft, 60hp Industrial injectors, Triple dog, Glacier 2mic filter, BD exhaust brake, ATI Super Damper, BD steering brace, Firestone bags, Big Wig swaybar, 4th Gen 20s and some home made Stableloads.