hey guys... i m trying to find out whether ppl are experiencing problems with rust on their aftermarket dba rotors

as some of you know the stock 3rd gen calipers do not rub the entire face of the rotors (more prominent at the front). areas which aren't 'rubbed' on the stock factory rotors are actually rust prove... but this aint the case for the DBA rotors so you get this ring of rust just outside the hub...

is there a problem with leaving this rust build up on the discs? what are ppl's solutions?

no problem its normal

ditto, it's normal. There is this solution that you can spray on to stop / reduce the rust build up, but I don't know how effective it is.

I'll post a pic up my rotors and calipers when I get a chance.

First time I noticed it I new I'm not leaving it like that. I just sanded the surface rust off and sprayed the rotors and calipers in a nice black, subtle but good looking. Makes the rotors look heaps better anyway. :D

I'll post a pic up my rotors and calipers when I get a chance.

First time I noticed it I new I'm not leaving it like that. I just sanded the surface rust off and sprayed the rotors and calipers in a nice black, subtle but good looking. Makes the rotors look heaps better anyway. :D

Yeah - I've been wanting to pull the rotors off and paint them but haven't had the motivation to do so yet. + mine are gold painted off the shelf, so I'll probably spray the face in 'brushed aluminium' and then mask it off and respray the hub and outer edge gold.

Thats a job for next annual leave.

dont ya like the colour of rust

looks bad but its not a problem

All the brandnew AUDIs at the local caryard have rusty discs... :badgrin:



First time I noticed it I new I'm not leaving it like that. I just sanded the surface rust off and sprayed the rotors and calipers in a nice black, subtle but good looking. Makes the rotors look heaps better anyway. :D

You're wasting your time imho. :confused:

Just buy a bottle of Selleys Rust Fix, paint it onto the rust and it turns a blue-black.
Don't have to do any sanding and the rough surfaces looks better on your discs anyway.

The stuff is a chemical reaction with the rust and it won't burn off.

Yeah mine have done this too. Although at least the hubs of the rotors are now painted, unlike the older DBA rotors.

Yeah mine have done this too. Although at least the hubs of the rotors are now painted, unlike the older DBA rotors.

funny u say that becoz when i got my discs fitted... the dumba$$es at the workshop did such a good job of cleaning the rotor surfaces prior to fitting that the brake cleasning agent got onto the hubs as well so now i also have patches of rust on the hubs as well

that's the sh!t that happens when you are not working on the car urself... but oh well

might repaint them next yr... got a thesis to handle now :cry:

Just buy a bottle of Selleys Rust Fix, paint it onto the rust and it turns a blue-black.
Don't have to do any sanding and the rough surfaces looks better on your discs anyway.

The stuff is a chemical reaction with the rust and it won't burn off.

so u mean the Rust Fix actually turns rust into some sort of a coating that will stay there and prevent further rust? have i understood u correctly??

so u mean the Rust Fix actually turns rust into some sort of a coating that will stay there and prevent further rust? have i understood u correctly??

YES!

It turns the *rust* into a solid coating that
1) prevents further rusting, and
2) you can paint over it etc etc, don't even need priming.

It doesn't affect clean unrusted metal.



Don't get it on your skin though. Don't think its seriously poisonous (well I ain't dead)
but it seriously stains your skin brown and it takes 2-3 wks to wear off.
Can't wash it off clothes etc either.

YES!

It turns the *rust* into a solid coating that
1) prevents further rusting, and
2) you can paint over it etc etc, don't even need priming.

It doesn't affect clean unrusted metal.



Don't get it on your skin though. Don't think its seriously poisonous (well I ain't dead)
but it seriously stains your skin brown and it takes 2-3 wks to wear off.
Can't wash it off clothes etc either.

Yeah similar product but different brand saved an old N13 Pulsar my mum used to have..lol

Unrelated, but has anyone noticed that the rust converter has a 'pearl' effect when dry - looks really cool...

I can imagine some bogans spraying an entire white VB Commodore or something with it - pretty AND practical :)

The discs rust in a major hurry because they are a cast iron with a very low carbon content. (Which is one of the reasons why the old Alfas and Fiats rusted so well, their steel contained very little carbon - it was more iron than steel...)

Cheers
Heath Young

YES!
Don't get it on your skin though. Don't think its seriously poisonous (well I ain't dead)
but it seriously stains your skin brown and it takes 2-3 wks to wear off.
Can't wash it off clothes etc either.
That would be because rust converter is mainly made up of Silver Nitrate. This stuff turns brown under UV light. The light is enough to do the trick. Back end of 2003 in chem we were using the stuff, and some of the ppl were giving themselves 'tatoos' with it. Was funny, until someone got some just above my lip, so I had a hitler mousache for a week that I couldnt remove.........Good fun tho! :D

That brown stuff is Phosphoric acid.

You really should rinse it off your metal after it does the job (everything blue-black).

Leaving it on too long will start etching your base metal.



The discs rust in a major hurry because they are a cast iron with a very low carbon content. (Which is one of the reasons why the old Alfas and Fiats rusted so well, their steel contained very little carbon - it was more iron than steel...)

chatted to an old fella some yrs back who said he worked in the Alfa factory in the 1960/70s.

He said Alfas rust because...

1) 60s/70s Italian steel wasn't the best quality anyway

2) Alfas built like racecars, with many boxed sections. No one bothered painting or
treating the insides of those boxed sections, so they rust from inside out.

3) Alfas at home didn't really rust all that badly... but after spending 6mths on a ship
surrounded by salt water...! :shock:

hey guys... i m trying to find out whether ppl are experiencing problems with rust on their aftermarket dba rotors

as some of you know the stock 3rd gen calipers do not rub the entire face of the rotors (more prominent at the front). areas which aren't 'rubbed' on the stock factory rotors are actually rust prove... but this aint the case for the DBA rotors so you get this ring of rust just outside the hub...

is there a problem with leaving this rust build up on the discs? what are ppl's solutions?

Whoever fitted the discs were over zealous in their cleaning of the discs and have taken off the corrosion protective paint. It actually has labelling on the disc that advises you not to clean any surface except those that are abrased by the pads.

Don't lose sleep over it.

Shoot it with enough brakecleaner spray and any paint eventually disappears anyway.