Tar undercoating removal

[GA-Z-BO]

I'm just now attempting to remove all the undercoating from my "73" 240Z I want to remove it all so i can get all the rust and start with a fresh new undercoating. does anyone know the best and/or easiest way to remove this stubborn meterial?

[beandip]

I just used a putty knife and started scraping. If doing the tar mat that is inside on the floors . Dry Ice to freeze it and the putty knife will lift it off, If where you live it is still cold it may come off without the Dry Ice.

[73_240z]

OMG! This totally works! I was scraping away with a hammer and chisel and thought I would give it a try and wow! I went to a place in Portland that sell dry ice, paid $5 for a 5-pound block and it took like 10 minutes.

[TomoHawk]

I use a heat gun on the underbody rustproofing, and scrape it with a wood or plastic scraper. Then some solvent to wash off the rest.

[peterc]

Heat or cold both work, but cold is much cleaner and faster, as I discovered while removing the tar mats in an unheated garage in the winter in Ottawa. Chilled or frozen, the mats shatter quite easily when struck with a hammer and putty knife, and don't leave any residue. Using dry ice in the summer would produce the same results in a more comfortable working environment.

Cheers

[TomoHawk]

He was asking about removing the undercoating not the tar mats. How would you apply dry ice to the underside of the car?

[sblake01]

You could always blast it with liquid nitrogen........

[Poindexter]

He was asking about removing the undercoating not the tar mats. How would you apply dry ice to the underside of the car?

My Dad taught me this trick when I was a kid. Wrap up a soap-bar sized piece of dry ice in an old towel, twist and hold by resultant handle- fits in every nook and cranny. Hold for 15 seconds and smack with a rawhide mallet while you're holding against the next spot along the line. Very efficient. If whatever coating is too thin though, it is much harder.

[cbudvet]

I am ultimately going to have my car body chemically stripped. I found a place that will do it for about 6-700 dollars. I decided to go this way as I will be taking it to the body shop as soon as its naked. Prior to this decision. I went to the local Autozone and asked for the nastiest, nuclear powered, paint stripper and bought something called AIRPLANE REMOVER. Thats what its really called. I was working on the wheel wells and it works great! Its a bit messy (gooey) and if you get it on your skin it burns like the ****ens but it works fast. I then wiped, scraped the goo off. If you are using it underneath, you must where eye protection, gloves, etc in case it drips on you. The interesting thing is, I haven't seen nearly as many airplanes around my house.

Carl

[cbudvet]

Wow, the censorship stuff works. It censored out the word like the author Charles Dic..ens who wrote Oliver Twist.