Undercoating Questions, Ziebart/Rusty Jones, etc Options

[turtleman]

Those of you who have done complete restorations might be best able to answer some of my questions.

I was wondering if anyone had experience removing a Ziebart undercoating from a car and how much rust was present under that coating? My floorpan appears very solid and rust free, however, I am aware that on occasions moisture can form between poorly bonded rustproofing and there can be much rust under the undercoating.

I assume that cars that were rustproofed at the dealer when they were new might have had a better chance of having betterbonding of their undercoating than cars where the undercoating was applied at a later date when dirt and grease might have made the bonding poor.

I am interested in knowing if anyone had a car that had Ziebart rustproofing that turned out to be relatively free of rust when they removed the undercoating?

Also out of curiosity, I wondered about anyone who had a Rusty Jones undercoating how their car looked after removing the undercoating?

I sure would hate to remove all my uindercoating if it is actuially working and still effective, which appears it is.

I appreaciate any discussion on this topic.

Chip

[turtleman]

The responses to this topic have been very informative as to the application of foam in the production of the 914. I was aware that Porsche had utilized the foam as a means of structuraly reinforcing certain areas and it is very interesting seeing the cutaways and cross sections.

However, I am still curious if any of you that have done complete restorations and had a ZIEBART undercoated car can tell me your experiences when you stripped off that undercoating. I am curious if the metal below was predominantly FREE of rust, notwithstanding those areas of weakness such as where Porsche had applied foam or where battery acid may have seeped and been the cause?

Thanks for responding!

Chip