Fender lip rust

[Fordiesel69]

On a lot of really nice crown victorias at our state auction, I noticed the cars were rust free except for the front fenders. I hate to walk away from these but I do.

Upon pulling my inner fender liner, I notice the fender is actually 2l ayers, meaning the rust cannot be addressed from the engine compartment side, rather you cannot reach in between the layers. So my question is, how does it even start to rust in there, and secondly how do you address it, if mine ever becomes that way.

[PetesPonies]

Its the perfect place for moisture to be trapped. That is how the rust begins. When places cab dry out, rust is usually not a problem. I assume you are talking about a structural support being in the rear which makes it like a double layer. You could drill or cut a couple small holes which would allow you some access to clean out the debris and coat with Master SEries.

[88GT]

easiest thing to do is replace the fenders.
the rears arent rusty? hmmmm kind of a weird place to be the WORST rust

[Fordiesel69]

See, the old 92's and older where just a single layer and thick. Now they weld a 2 skin fender, the outer is the pretty part and than the inner structural part. Up inside is where the rust starts. The rear looks good and so does the floor seams. It sucks because im sure the fenders are hard to change.

[drizler]

easiest thing to do is replace the fenders.
the rears arent rusty? hmmmm kind of a weird place to be the WORST rust

You have a good point there. Look at the fenders on Chevy trucks like Silverados ect. The whole inner and outer fenders are one giant piece that tapers into a narrow canyon where all the dirt and moisture go to lay. There is no real way to fix something like that unless it is a true labor of love. Definitely not worth the bother when a fender is fairly cheap and available. If it's just surface rust I can't see why you couldn't just scuff, treat and repaint though.