Brake Discs front coating

capese21 · 20th June 2009, 10:06

Dear all

can anybody help with this,

I have some new front brake discs to fit. They have a grey soft paint like coating on them. Does this need to be removed or will it wear off when in use?

Help appreciated.

Thanks

Ed.

GreyGhost · 20th June 2009, 10:17

I believe that is a protection coat to prevent discolouration and or rust when in storage. Should wear off as soon as you apply the brakes a couple of times.

FROGGY · 20th June 2009, 10:48

I would always clean new discs with a solvent to remove ANY coatings or grease before fitting in order to avoid contaminating the new pads. Only costs a few pence but may save your neck.

Mick

Simon · 20th June 2009, 10:52

You'll be fine to leave the coating on. My new MG-R discs had that kind of silvery-grey coating on them. They looked very smart but the (reputable) garage owner said "Nah, it'll wear off after you hit the brakes a couple of times". Sure enough, it did.

As said though, it's an anti-corrosion protection whilst they are in storage/transit.

dustybin · 20th June 2009, 21:35

it´s the back one´s you have to be careful with, the paint heats up and if you applie the handbrake the shoes stick to the disk, we have had a few volvos whos lineings has been ripped off when the owner forces the handbrake to release.. never come across a rusty disc that was just waxed protected,.

Departed · 21st June 2009, 18:45

It's not a painted coating, but a metal coating. It's the same stuff as on some screws. As suggested, it wears of very quickly, but beware it seems to reduce the brake performance until it does. My handbrake was rubbish when I first replaced the rear discs.

FROGGY · 21st June 2009, 19:09

OK, I must admit that cleaning off takes an extra 2 minutes

robwijnstok · 22nd June 2009, 10:50

Like the other members have told you can leave the paint on the disks, but... I would take it off anyway, all the paint I mean.
Take it all off, degrease it as good as you can, and respray the disks with a good heat resistant paint 650ºC. Not on the sides where the pads will be pressed on while breaking.

Reason? After a year the disks will start to rust, and that is not a nice view. While the disks are still off it is a small job to do with a great and long lasting result.

Departed · 22nd June 2009, 12:08

Most new cars have this coating on too, and it isn't removed.

GERFIX · 22nd June 2009, 15:20

Whatever you do, don't overdo it with any copper grease or such like. I appeared to have done so and ended up cooking some of the stuff on one of my back discs and was overtaken by a small plume of smoke when I stopped at the end of a slip road!! Some copper grease had gotten onto the disc and formed a nice little "slag heap" where it met the pads.

A thorough going over with some Wynn's brake cleaner sorted that out though!

20th June 2009, 10:06	#1
capese21 This is my second home MG ZTT 180 Sports Auto. Join Date: Dec 2006 Location: London Posts: 3,930 Thanks: 18 Thanked 180 Times in 143 Posts	Brake Discs front coating Dear all can anybody help with this, I have some new front brake discs to fit. They have a grey soft paint like coating on them. Does this need to be removed or will it wear off when in use? Help appreciated. Thanks Ed.

20th June 2009, 10:48	#3
FROGGY I really should get out more....... MG ZT CDTI Join Date: Sep 2007 Location: 17500 REAUX, CHARENTE-MARITIME Posts: 2,749 Thanks: 2 Thanked 133 Times in 90 Posts	I would always clean new discs with a solvent to remove ANY coatings or grease before fitting in order to avoid contaminating the new pads. Only costs a few pence but may save your neck. Mick __________________ http://i200.photobucket.com/albums/a...ps628d4119.jpg IN THE BLACK NOW

21st June 2009, 19:09	#7
FROGGY I really should get out more....... MG ZT CDTI Join Date: Sep 2007 Location: 17500 REAUX, CHARENTE-MARITIME Posts: 2,749 Thanks: 2 Thanked 133 Times in 90 Posts	OK, I must admit that cleaning off takes an extra 2 minutes __________________ http://i200.photobucket.com/albums/a...ps628d4119.jpg IN THE BLACK NOW

22nd June 2009, 10:50	#8
robwijnstok Gets stuck in Rover 75 Tourer 2.5V6 autobox, Rover Streetwise 2.0 DTi, MG ZR160 Join Date: Oct 2007 Location: Gelderland Posts: 617 Thanks: 5 Thanked 16 Times in 15 Posts	Like the other members have told you can leave the paint on the disks, but... I would take it off anyway, all the paint I mean. Take it all off, degrease it as good as you can, and respray the disks with a good heat resistant paint 650ºC. Not on the sides where the pads will be pressed on while breaking. Reason? After a year the disks will start to rust, and that is not a nice view. While the disks are still off it is a small job to do with a great and long lasting result. __________________ [SIGPIC][/SIGPIC] Membership Number 344 Driving with a BIG smile... and it's Chatsworth Elegant Bronze. Never drive faster than your guardian angel can fly!

22nd June 2009, 15:20	#10
GERFIX I really should get out more....... MINI COOPER S Join Date: Nov 2007 Location: Tranent, East Lothian, SCOTLAND Posts: 2,834 Thanks: 0 Thanked 0 Times in 0 Posts	Whatever you do, don't overdo it with any copper grease or such like. I appeared to have done so and ended up cooking some of the stuff on one of my back discs and was overtaken by a small plume of smoke when I stopped at the end of a slip road!! Some copper grease had gotten onto the disc and formed a nice little "slag heap" where it met the pads. A thorough going over with some Wynn's brake cleaner sorted that out though! __________________ .......................................Colin http://i245.photobucket.com/albums/g...Cooper-S-2.jpg

20th June 2009, 10:17	#2
GreyGhost Banned 180+ Sport Auto Join Date: Oct 2006 Location: Bedford Middle Level Posts: 17,787 Thanks: 0 Thanked 18 Times in 5 Posts	I believe that is a protection coat to prevent discolouration and or rust when in storage. Should wear off as soon as you apply the brakes a couple of times.

20th June 2009, 10:52	#4
Simon Banned - Join Date: Nov 2006 Location: - Posts: 10,318 Thanks: 0 Thanked 4 Times in 3 Posts	You'll be fine to leave the coating on. My new MG-R discs had that kind of silvery-grey coating on them. They looked very smart but the (reputable) garage owner said "Nah, it'll wear off after you hit the brakes a couple of times". Sure enough, it did. As said though, it's an anti-corrosion protection whilst they are in storage/transit.

20th June 2009, 21:35	#5
dustybin Avid contributor MG ZT Join Date: Nov 2006 Location: Northamptshire Posts: 200 Thanks: 1 Thanked 1 Time in 1 Post	it´s the back one´s you have to be careful with, the paint heats up and if you applie the handbrake the shoes stick to the disk, we have had a few volvos whos lineings has been ripped off when the owner forces the handbrake to release.. never come across a rusty disc that was just waxed protected,.

21st June 2009, 18:45	#6
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	It's not a painted coating, but a metal coating. It's the same stuff as on some screws. As suggested, it wears of very quickly, but beware it seems to reduce the brake performance until it does. My handbrake was rubbish when I first replaced the rear discs.

22nd June 2009, 12:08	#9
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	Most new cars have this coating on too, and it isn't removed.