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?

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.

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.

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.

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

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

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

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.

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

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