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Honda Jazz Forums => Honda Jazz Mk1 2002-2008 => Topic started by: bus_ter on August 11, 2020, 04:26:32 PM

Title: Rust starting to appear on rear arches
Post by: bus_ter on August 11, 2020, 04:26:32 PM
I've got the beginnings of rust showing on the bottom of the rear wheel arches. Does anyone recommend an easy way to try and treat/repair this?

I'm worried if I sand it down and spray paint I'll make a mess of it.
Title: Re: Rust starting to appear on rear arches
Post by: sparky Paul on August 11, 2020, 04:59:58 PM
How bad is it? Have a good feel around the rear of the metal, see if it's scabby behind, or if the metal looks like it has 'swelled'... if it is, and feels like rot, proceed with caution, and don't start prodding.

Usually, it's just surface rust that migrates under the paint from chips on the edge of the arch. Much easier to deal with.
Title: Re: Rust starting to appear on rear arches
Post by: bus_ter on August 11, 2020, 07:23:29 PM
Have a look..
Title: Re: Rust starting to appear on rear arches
Post by: sparky Paul on August 11, 2020, 07:42:52 PM
On the face of it, it looks like a bit of surface rust. To be certain, you might have to detach the plastic liners, wash the muck out and have a feel around the back, see if it feels lumpy.

The trouble is, right down at the bottom there is always a little muck trap that can rot the panel from inside.
Title: Re: Rust starting to appear on rear arches
Post by: Jocko on August 11, 2020, 07:45:15 PM
My wheel arches are almost rotted away.
Title: Re: Rust starting to appear on rear arches
Post by: bus_ter on August 12, 2020, 05:21:14 PM
Quote from: Jocko on August 11, 2020, 07:45:15 PM
My wheel arches are almost rotted away.

Have you ever tried to treat/repair it?
Title: Re: Rust starting to appear on rear arches
Post by: Jocko on August 12, 2020, 06:21:04 PM
I sanded it down, put Kurust on it then painted with Hammerite
Title: Re: Rust starting to appear on rear arches
Post by: bus_ter on August 12, 2020, 08:34:36 PM
How long ago and how's it holding up?
Title: Re: Rust starting to appear on rear arches
Post by: Jocko on August 12, 2020, 08:54:00 PM
Rubbish. It was done last year and is worse than before I started. It needs the rear bumper off and an orbital sander to clean it down. I'll post photos tomorrow if I can remember (lots on my plate at the moment).
Title: Re: Rust starting to appear on rear arches
Post by: Jocko on August 13, 2020, 06:45:19 PM
Here is a picture of my rusty wheel arch. The other side is not quite so bad.
My car does not have plastic liners in the rear arches, except a bit towards the back protecting the plastic bumper.

(https://i.imgur.com/2uqWqY6.jpg)
Title: Re: Rust starting to appear on rear arches
Post by: bus_ter on August 13, 2020, 09:43:26 PM
Yeah that's a fair bit worse than mine. I assume it's still got to be much worse still before it becomes an MOT issue?
Title: Re: Rust starting to appear on rear arches
Post by: Jocko on August 13, 2020, 10:23:32 PM
It has strength. It just looks hideous.
Title: Re: Rust starting to appear on rear arches
Post by: sparky Paul on August 14, 2020, 04:47:03 PM
Quote from: bus_ter on August 13, 2020, 09:43:26 PM
Yeah that's a fair bit worse than mine. I assume it's still got to be much worse still before it becomes an MOT issue?

Sharp edges fail the MOT. So long as the turned in bit it still there, you should be okay. The MOT tester shouldn't go poking about.

The 'proper' fix is a wheelarch repair panel, but a tidy up, a dose of rust treatment and a good smear of Tetrosyl Fibrofil (or similar) before sanding and painting will save them for a good few years. Fibrofil is magic stuff, will turn a lace curtain into a strong surface and stops the rust coming through - standard filler is porous, and it's not long before the paint's bubbling again. Your biggest worry with rear arches is that rot doesn't creep into the end of the sills.

You could make Jocko's look perfect again, but for how long... it's down to how much longer you want out of the car.