engine and drivetrain undercoat/primer

[Steve73tii]

Undercoating has been "in progress" for a couple years now 'cause I wasn't sure which way to go. Now I have the transmission and exhaust out again for a 5-speed conversion and I'm getting around to it.

The original undercoat has protected very well, but it's degraded to the point where you can scrape it off with your fingernail. Underneath that is clean, smooth Nevada-ish factory primer (with body-color overspray around the outside).

Above the rear crossmember where it was less clean, I already wire-wheeled, etched, and epoxy primered (silver areas in pic 2).

My dilemma is, do I do the same to just the rough spots up front, call the factory primer good, and cover everything with black undercoat? Or do I primer everything? And then do I leave it just silver epoxy? It would be subject to stone chips, but I would really be able to see any trouble spots and attack them.

Any advice appreciated.

Steve

[jerry]

to borrow from the cliche:

'if it ain't broke, don't fix it"

find your obvious trouble spots, address them and feather into good existing coating. don't remove that beige-colored undercoating. clean up any exfoliating thick coating, respray and leave the rest alone.

unless you are wanting to wow all of us with exquisite shots of a fresh new underbody, you're just making busy-work.

[Steve73tii]

Ha ha - good point. Like I said to a friend the other day, there's only one person who spends any time looking at the underside of my car!

Sounds like just need to get the crumbly stuff off and address some rust spots. Unless anyone has any busywork suggestions - I busywork :-)

[kris]

I ground off any undercoating that was loose and flaky, then used a chemical etch and did two layers of POR15 on the entire underbody and wells, and added Wurth undercoating to the wells and rear subframe area for good measure. I love busy work.

[Steve73tii]

Hey Kris,

Were you able to get the Wurth undercoat locally or did you mailorder? I don't think anybody sells it retail down here.

How's your car coming? It sounds like you're doing a really thorough job. I wanna see you driving it before the next Mississauga drive!

Best,

Steve

[kris]

Hey Kris,

Were you able to get the Wurth undercoat locally or did you mailorder? I don't think anybody sells it retail down here.

How's your car coming? It sounds like you're doing a really thorough job. I wanna see you driving it before the next Mississauga drive!

Best,

Steve

I had to do a mailorder - http://www.autogeek.net/wuhibuunun.html - to Nathan's place (thanks Nate!)

If you decide to use it, mask everything off really well that you don't want covered, wear a respirator (and a cheap spraypaint suit) and practice in an inconspicuous area before you go whole hog on the underbody. You don't want to fixate on any one area too long or it really builds up. Bill Williams did a nice job on his car with Wurth. The other options are Wurth Body Schutz or Herculiner. I'm only mentioning all this because you say you like busy work...it's all overkill as aptly pointed out earlier in this thread.

My car is an accidental nut and bolt restoration. I will drive it down to see you B-LO guys...one day!

[Jaycen_PNW2002]

Solvent free & water soluable for easy use. Matches the factory texture. Fun to spray with an undercoating gun and is very tough.

[H_Krix]

The other options are Wurth Body Schutz or Herculiner.

Here's a shot of Herculiner in action if you're considering it. Tough as nails, but it gets everywhere (I brushpainted it) and stinks to high hell.

[jerry]

The other options are Wurth Body Schutz or Herculiner.

Here's a shot of Herculiner in action if you're considering it. Tough as nails, but it gets everywhere (I brushpainted it) and stinks to high hell.

i must say, i for one, am duely wow'd by your exquisite shots of your undercarriage.

and i really mean that.

perhaps one day i too can join this club. very very nice.

[Steve73tii]

i must say, i for one, am duely wow'd by your exquisite shots of your undercarriage.

I proposed to my wife with that line...

But seriously, beautiful job on the car and nice pics. Something to aim for (along with "light" and a "level floor" in my garage, but that's a whole 'nother job...)

--Steve

[khale2011]

I also suggest Herculiner - bed liner and bed liner coating... I'm ordering it via online 'coz i have no time to go to retail stores... it will take me 45 minutes drive to go to town.