S14a rot :(

[ricksx]

So I've decided to retire the 200 for a while at a mates garage while I sort out the little rust (that I thought was little).

As I've started with the wire wheel I've discovered that there is a lot of rot under the mass of stone chip on the rear sills. And some shoddy welding work.

I've cut it all out which was emotionally difficult cutting it open haha. But the majority of it is done and welded back up.

A good dose of etch primer has even been generously sprayed into the box section before I sealed everything up.

But a mate of mine said something about a 'expanding foam' that can stop rust. He said classic car restorers use it but he can't remember what's called.

Don't suppose anyone here has heard about this?

I was just going to spray a s**t load of wax oil into the cavity behind the side panels in the back as they go straight down to the sills. This expanding foam sounds like a better plan. Not sure if he's talking nonsense though.

[ANDY black s13]

It will hold water/moisture,
many years ago I had a mod saloon mk1 escort race car and the sills had been filled with the foam stuff
after it had been restored/had new panels and inner outer sill and prepped for racing
it didn't take long for rust to reappear (couple of years),the sills were totally rotten 22 years later

the wax stuff will work way better imo,it will repel any water not absorb it
there is possibly a newer version of the foam that peeps are using in resto jobs that don't absorb and hold moisture?
but the stuff used in my mk1 was terrible, even when dug out to remove it,it was too late and had started to rust the panels

[-ghost-]

Cavity wax is what you want just make sure you have done allmyiur welding before using it.

[shikari chaos]

Heard good things about this stuff http://www.bilthamber.com/cavity-waxes

[ollie1992]

I'm in exactly the same boat, I have my rear subframe off at the moment because of it (((

[ricksx]

I've heard of this bilthamber stuff. Petrol used all sorts of the stuff on his project. I'll give it a go, seems better then normal cavity wax.

Sounds pretty bad having to remove the subframe. I was going to do all of that as a matter of course but I'm missing driving

I've had to completely cut out the bottom of the rear sill and even replace the jacking point as all of that was very badly corroded. I doubt it would have held up to the jack if I got a flat tire :/