Rust on rear arch

[Smuggler]

One of my rear arches is starting to get a little bad on rust, its not really really bad, but its getting worse? What can I do to sort it? I can get rid of surface rust and anything on other cars, but don't really wanna do it on this, as I don't wanna **** it up, having the paint not matching properly as well as it's pearlescent. Any ideas?

[Violet]

If it's small, you can do it in an afternoon, and then get it sprayed by someone else.

I just sand it back, it's usually larger underneath than on top, and there's probably more underneath. I did mine, a few bubbles revealed the whole arch was hanging off. The waxoyl and paint was holding it together. I replaced both of mine with full arches before the winter came.

[astramojo]

I've just done the rear arches on my vectra.

just sand blasted the rust off, etch primered then stonechipped them.

I'll be sparing the base coat and laquer on monday

[DaveB]

The only way to get rid of rot is to cut it out and replace.