Painting brake discs??

R2D2

MB Enthusiast
Joined
Mar 23, 2004
Messages
6,935
Car
C350
This might sound mad but I'm getting my brakes changed this week and I hate the way the "hub" bit of the discs and also the ventilated edge rust over time. Is there any merit to painting the sides of the hub (the bit you still see when fitted) and the ventilated edge. Obviously I'd have to use high temperature paint which I happen to have a tin of in the garage.....any thoughts welcome.
 

Troon

MB Enthusiast
Joined
Aug 23, 2011
Messages
1,184
Location
Staffordshire
Car
A big one
You'd be slightly reducing the disc's abiility to radiate its heat away. Can't imagine that'd make any real difference though - just don't paint the middle of the vented "sandwich".
 

brucemillar

MB Enthusiast
Joined
Nov 18, 2010
Messages
8,659
Location
Next Door to Alice - 25 'kin years now
Car
C55 AMG Wagon - W124 300te 4matic Wagon - BMW 4.8is X5 E53 - SWB Pajero 3.5 V6 24v
R2D2

I do this on my C55 with a brush on primer and brush on smooth Hammerite. With very open wheels it just cleans everything up nicely. Anyway luminous pink is a good colour.
 

Mike Walker

MB Enthusiast
Joined
Jul 9, 2008
Messages
2,572
Location
North Kent
Car
Mercedes W204 C220cdi Estate Ford Fiesta Mk 4
R2 - you need help! (statement not question)
 
OP
OP
R

R2D2

MB Enthusiast
Joined
Mar 23, 2004
Messages
6,935
Car
C350
New tyres going on soon, refurbed AMGs, new cross drilled brakes- can't have rust appearing anywhere!!:)
 

Alps

MB Enthusiast
SUPPORTER
Joined
Nov 29, 2002
Messages
7,175
Location
London\Essex
Car
E55 2004 Silver, E63 Weistec AMG(SOLD), E55 2004 Silver(SOLD), C36 AMG 1997 (SOLD)
R2,

I did the same, satin black hammerite on the outer vents and the hub part, dont worry about being too exact as any overpainting gets cleaned away by the pads, try and keep roughly to the unworn area tho.
 

flango

Hardcore MB Enthusiast
Joined
Jun 10, 2008
Messages
10,983
Location
Gods own country
Car
Mercedes SLK R171
As post 2 you should never paint the hub or edges as it affects heat dissipation and braking performance and is particularly more noticeable on high performance cars and it can glaze the pads.
 

wemorgan

MB Enthusiast
Joined
Apr 5, 2008
Messages
8,106
Car
A205 C220d
Meyle sell brake discs that are zinc coated to stop this from happening.
 

whitenemesis

MB Club Veteran
SUPPORTER
Joined
May 7, 2007
Messages
16,824
Car
Lexus RC300h F-Sport 2019
R2 if you use genuine MB discs they come with a grey protective coating. Do not remove this, let the pads clear the braking surface ( which they do within the first couple of applications) and the coating will remain on the hub and rim. Mine haven't rusted.
 
Last edited:

LTD

MB Enthusiast
SUPPORTER
Joined
May 21, 2009
Messages
5,573
Location
Planet Earth
Car
Yep, one of THOSE !!!
Imagine worrying about rust on the brake discs of a Mercedes ...

What about the rest of the car ?
 

clever dicky

Active Member
Joined
Nov 27, 2010
Messages
421
Car
Jag
I did the same to mine when I changed my front discs :)
But I get so much brake dust anyway its hard to see. But its not a problem, i 'dripped' loads of paint into the the channels between the disc plates, and made sure it coated as much as poss. without losing it through the holes.

Only time I'd say you could do it is when they're new. But make sure it heat paint for exhausts. As brakes do get hot !
 

DRBC43AMG

MB Enthusiast
Joined
Mar 15, 2010
Messages
1,078
Location
Switzerland, Sion (VS), the canton of mountains, w
Car
99' C43 AMG "T Rex", 00' Renault Twingo1, Ultima Sports Can-Am
Heat paint on the hubs only not on the edge and vents. It does make the look cleaner, but then you need wheels with spokes you can see through, otherwise you can't see anything apart from removing the wheel, but I doubt you are going to do that in the pub parking just to show off :D
 

Chrishazle

MB Enthusiast
Joined
Nov 13, 2008
Messages
3,757
Location
Nr Ashford, Kent
Car
2008 S204 C220CDI Elegance Estate Auto, 2008 R171 facelift SLK280 Auto.
The Zimmerman discs for my 968 coupe came with a full rust proof grey coating. As mentioned above, first application of the brakes took the coating off the contact area, the remainder stayed grey and did not rust.
 

BTB 500

MB Club Veteran
SUPPORTER
Joined
Aug 7, 2005
Messages
19,065
Location
Berkshire
Car
R129 SL500, W639 Vito 120, S203 C230
I did the hub part on my SL disks 3 years ago when I changed to the AMG wheels as it was clearly visible and looked bad. I gave them a single coat of silver Hammerite smooth - agree the slightly reduced heat dissipation could be an issue on a track car with repeated heavy braking, but not for the way I use the SL. It's only a band maybe 1" wide, and the rest of hub portion is bolted to a huge AMG 18" heat sink ;)
 

thefast1

Active Member
Joined
Jun 16, 2009
Messages
66
Location
Hants
Car
CLK 350 Sport Cab
I did the hub part on my SL disks 3 years ago when I changed to the AMG wheels as it was clearly visible and looked bad. I gave them a single coat of silver Hammerite smooth - agree the slightly reduced heat dissipation could be an issue on a track car with repeated heavy braking, but not for the way I use the SL. It's only a band maybe 1" wide, and the rest of hub portion is bolted to a huge AMG 18" heat sink ;)
Did mine with silver caliper paint that I had left over from an earlier project, good to know there are others out there that like the minor details.
 

Superspec

Active Member
Joined
Jan 19, 2011
Messages
232
Car
Car
It's fine to paint them. Plenty of discs start out fully coated, the pads wear off the coating on the disc surface within a few miles leaving the rest of the disc looking lovely. Painting the hub is fine too, the only bit I'd be careful with is the mating surface where the hub and wheel meet, I wouldn't paint that. I read somewhere that the paint can burn off/wear and can cause the wheel bolts to come loose since the thickness of the paint has effectively turned into fresh air.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top Bottom