How To Remove Undercoating Sprays

[Military Jeeper]

The PO sprayed 3M undercoating spray in the tub of the Jeep and I can't get. I tried a abrasive sanding disc today with no luck. I've done some research and the only things I've seen that work are very time consuming (Torch it and scrap it, dry ice).

Is there anyone out there that has any experience with the removal of this stuff easily. I don't have access to a sandblaster so please don't recommend that (otherwise I'd be using it).

Thanks for your time.

[miljeep]

Good luck. I tried to google this for 30 minutes and came up with nothing.

[Dragline]

When I did my CJ frame, I had to torch it, scrap it (Razor blade and Putty knife) and then sand blast the really heavy areas that were undercoated on the frame. Talk about time consuming...

[trailsnail]

That really blows. Why would someone do that? Haven't they heard of Herculine, etc. Sorry I have no idea, but wanted you to know that I feel the pain.

[Junk Yard Genius]

I've done several vehicle restorations and there are only a few effective ways to remove undercoating...

1. Is to acid dip the part, or in your case the tub of the vehicle.
This isn't as expensive as you might expect, but it is a problem stripping everything off the tub to get it prepared for the acid dip.

2. A product like 'Zip Strip'.
Again, it's a chemical stripper that will take the coatings off to bare metal, and you have to watch getting it into seams.
It's 'Acid Dip' on a smaller scale.
These chemicals are VERY caustic and should be handled with the proper safety equipment!

3. If you are doing a very small patch, try a wire wheel in a drill.
It's messy and the undercoating will plug up the wire wheel very quickly, but you WILL get down to bare metal.
The wire wheels are sacrificed in this case since there really isn't any way to get the 'Goop' out.

4. Torch or heat gun and scraper, and then use a wire wheel.
This is dangerous since the undercoating can and will catch fire if you overheat it enough!

[E5EDDIE]

about two pounds of C-4 might be enough!

[ArmyFSJ]

I use C-4 most every day and 2 lbs will only put a dent in it. Now a 2 hundred pounds might do it.:D

[miljeep]

didn't they talk about coating the HMMWV under carriage with rhino liner a few years back. Something about how it helps to absorb the blast and changes the way the metal reacts during the blast? That would probably be a good sign that the stuff is tough to get off.

[korisu56]

Yeah, mythbusters, or someone, coated a house in rhino lining or something to that effect. They blew something up right next to it, and it only took out the window I think.

[05warrior]

Smash Lab did that, and it actually kinda worked.

[DDAWG3953]

Just bought a Scaler(?) The thing was about $50 and worked like a champ. took rust and undercoating off the frame in about 5 hours. it would have taken four or five times as long with a wire brush.

[Dragline]

Does it look something like this? Needle scalers can be used both as a scaler or flux chipper.
http://www.xinxing-pneu.com.cn/UploadFiles/Product/2007020117430065563.jpg

[Ghost00TJ]

I second the Zip Strip type of chemicals. I first used it in early 80's on my Uncles Trans Am worked good then 10 layers of paint gone fast.

Used again last year on a Mustang with bad overspray damage (it came like that) and the striping agent worked beautifuly I would think it would eat undercoating just as well given its rubberized base.

[DDAWG3953]

If you have access to air tools you can get a adjustable scaler for about $50 dollars. It works pretty well and saves a lot of time. if the coating is still rubbery, it might peel right back with the scaler. Hope this helps

[DDAWG3953]

Thats it you won't need a top of the line tool unless your doing this stuff all the time

[Ghost00TJ]

That scaler looks cool, now I have another reason to buy a aircompressor lol but hone I can redo the cabinets with this...

[03Sahara]

Why do you want to get rid of it..........keeps rust out and makes washing off dirt and grime easier?