removing undercoating

-
Get several cans of aircraft paint remover, paint brush, rubber gloves, goggles and go to work. Comes off like a champ.
 
Depends on condition of undercoating. If it is really dried out and rusty, a scraper will take most of it right off and then I use a wire brush in a drill. For stuff still adhered if you warm it up with a propane torch till it softens it will be easier to scrape.
As for how much fun it is to do under the car I refer you to Captainkirk:
http://www.forabodiesonly.com/mopar/showpost.php?p=1970163366&postcount=715
 
If you can get it on a roticcerie, you can use a Hotzie to power wash it off.
 
High powered pressure washer will do it as well.
 
I did it on my 70 dart while it was on jack stands. I used a cheap harbor freight heat gun and a putty knife. It worked very well. Just watch out for the lava hot rubber. And wear eye protection. It really wasn't as bad as I thought it was going to be. Oh yeah keep the heat gun at an angle that the under coating won't drop into it.
 
mopar79sean said:
I did it on my 70 dart while it was on jack stands. I used a cheap harbor freight heat gun and a putty knife. It worked very well. Just watch out for the lava hot rubber. And wear eye protection. It really wasn't as bad as I thought it was going to be. Oh yeah keep the heat gun at an angle that the under coating won't drop into it.
Click to expand...

This is the method I used. Also a razor blade scraper. Then I used solvent on rags to clean the surface. After that Eastwood rust encapsulating paint.
 
Pawned said:
Is this first, 2nd or 3rd hand information
Just wondering it you have done this yourself?
Click to expand...

This is first hand info. I used it to remove the undercoating in the part of the floor where my sub-frame connectors would be welded to. I also used it to clean up the slag from the welds and where the welding burned the paint on the floor inside the car.

vbpgimage.php


vbpgimage.php


vbpgimage.php
 
that looks to be a very clean car,anymore pics?
i had already started this and was wondering what others have done
..miserable job!
 
Thanks, the car was a lifetime North Carolina car. I have a lot of pictures, did you want to see more of the underside or just general pictures. There are a lot in my galleries if you click there in my avatar box.
 
ir3333 said:
that looks to be a very clean car,anymore pics?
i had already started this and was wondering what others have done
..miserable job!
Click to expand...

I have been scraping it by hand when I get the energy to do so.
 
...yes,that's been my approach.
..a morning here,an afternoon there
..like eating an elephant"one bite at a time"
 
Here is a video of the larger needle scaler from Harbor Freight. I used the mini version since I was only doing a portion of my floors, seems it was around $20. A decent compressor will be needed for best results. I cant say mine came off as easy as the undercoating in the video but it will make short work of cleaning it off. Careful in rusty spots if you have any, mine was a little rusty under the heater box where the floor angles up to the firewall.

[ame]http://youtu.be/yJRf6zrulC4[/ame]
 
I tried the Harbor freight needle scalers but it broke in short time....they did work when they were working.
 
Yea, I was a little worried when the counter-girl was really pushing buying the insurance for it. I kept mine pretty well oiled and it worked fine. Sears may sell one too.
 
My car really does not have undercoating per se. A previous owner sprayed black paint over the caked on grease and dirt. This comes off easily with the needle scaler.
A lot of areas are left at bare metal. Being in Arizona, where there is no snow and salt, I am not going to worry about that now. Have not decided what to do with it after/if I ever get finished
 
I just did this last summer. I removed all the under coating on the inner fender area and the back side of the fender. A scraper and heat gun worked best for all the heavy stuff. came off real easy. I also bought a needle scaler from Harbor Freight but found it didn't do to well on the undercoating but was great with anything that was rusty. Definitely worth the $25!

once I got the heavy off I used crud buster wheels like these:

https://www.kimballmidwest.com/Catalog/CatalogIndex.aspx?p=6.340.101.316.1963

I didn't buy from here. I used a local auto body supply shop but you get the picture.
 
I used a propane torch and it came right off. Everything else like rust and paint I wire wheeled down to the metal.

This was my work attire. Cover every part of your body that you can. I looked like a goober but I was protected with safety goggles plus a face shield. It was the nastiest job I had to do on the car so far. Watch those wires on the high speed wire wheels too. They will eventually all come out and THEY WILL penetrate your skin. One flung off and was deep in my arm. Plus the wire was made with a twist in it. That made some fun times pulling that back out.

069.jpg


027-1.jpg


028.jpg
 
1968FormulaS340 said:
Don't play around with this. Put eye protection on and keep it on. A face shield if you are melting it off.

One drip of melted undercoating or aircraft stripper in the eye and you would pee your pants and wish you were dead.
Click to expand...

Sorry, but I have to ask. Are you speaking from experience??
 
You must log in or register to reply here.
-

Back
Top