Chassis Cavities Treatment

[Uwon]

Hi Guys,
What do you use to treat or fog the chassis/hood/engine lid cavities? Is there something better than Rust Check which is so messy?
Cheers.

[E Sully]

http://forums.pelicanparts.com/porsche-911-technical-forum/640222-corrosion-protectrant.html

[sfoster13]

I've been using this on my restoration

Internal Frame Coating w/Spray Nozzle

[porwolf]

Has anybody ever entertained the idea of filling the cavities with urethane foam. I have some experience with it and always thought of it as the perfect solution to keep water out of automobile cavitiies. Urethane foam is a closed cell product so it does not absorb any water at all. Plus, being urethane, it has excellent adhesion qualities to walls. Urethane foam comes in liquid form in various densities and final hardness. When you pour, or inject, the 2-component liquid mixture it heats up quite strongly, pressing into all crevices, and driving out any possible remaing water. I cannot imagine how water could possibly get back into the urethane filled cavities.

Seems to me a perfect solution.

[Fishcop]

In theory you'd think foam would work... It doesn't. Somehow it manages to trap moisture and promote rust. There's a few threads with photos of the problems.

[78SCRSMAN]

Originally Posted by Fishcop

In theory you'd think foam would work... It doesn't. Somehow it manages to trap moisture and promote rust. There's a few threads with photos of the problems.

Not only that, if you pour too much, you're gonna be in DEEP doo doo!

I used a kit from Eastwood. It was a can of basically liquid wax and came with a flexible spray tube that attaches to a gun you connect to your air compressor. The tip is about 1/4" in diameter so it fits into many tight spaces. The nozzle has holes pointing in all directions to get in all the crevasses.
Works great and didn't cost much.