I have a 1973 240Z and has factory undercoating..which product or tools best way to remove them..get it there to bare metal and wanted to fix some rust issue..Please help!!

Have you searched through the older posts? This has been covered numerous times.

The most wonderful tool ever invented:

http://mcmaster.com part number 4964A34

You could use just a scraper to get it off but it comes off a lot easier if you use a heat gun or even better with a gas torch just to warm it up. Then get the remaining residue media blasted.

Just make sure you work in a very well ventilated area as the fumes could be an issue.

Or you can use fuel, . My fuel tank was leaking and got all over the undercoating and it came off immediately... bwahah.

i found teh easiest way was to wait till the middle of winter. tappng it with a hammer or screwdriver and it would shatter. of course i dont think it will be -20 again anytime soon.

I am with anthony, when it is cold it pops right off. My car is covered with the stuff and we have it apart to paint. I am going to try putting dry ice in a cover and see if I can't get it to pop off in pieces that way. You can see in the pictures that at some point, I am certain when it was new, the stuff was put on every seam, behind every plastic panel, the entire bottom of the car, every where, including the entire bottom of the hood. The good news is that the ONLY rust was a nickle size hole in one of the shock towers.

Edited March 19, 201015 yr by IdahoKidd
wrong picture

My car was rust proofed by the dealer with Ziebart in 1976. I used WD40 to soften the stuff and wipe it away in my engine bay area. I would spray it on and leave it set for 15 or 20 minutes and then sometimes I had to use fine steel wool to rub it off.

The area in the picture was covered with Ziebart spray before I cleaned it.