Painting brakes

[syris]

Just bought an 02 GPZ500S, I have noticed that the inner part of the front disc's (black parts) have rusted. Anyone have any tips/what to use to paint them?

[binge]

High temperature paint.
I got a tin from halfords to paint my drums blue on my mini... They were blue already, but it had gone black and shitty.

It was like £5 for the tin.

<|Ben|>

[syris]

What about high temperature exhaust paint? I have a lot of it left from painting the exhaust?

[Git]

That would do the trick I suspect, I do not think the centres get that hot anyway.

[Retro-Man]

er.. don't paint them at all, painting the disc will restrict the discs ability to dissipate heat. the non contact surfaces of the disc will show surface corrosion, live with it.

Thats my advice anyway, but what do I know, I only work in the motor trade and have specialist training in brake systems.

Retro
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[cagiva gezzer]

wire bush the rust off and leave them
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"because one stroke isnt enough and four strokes waste two"

[DisabledRider]

^ agree's.

[syris]

Cheers lol, I will leave it for now as I am only picking the bike up tomorrow night. I wasn't quite sure how safe it would be.

Although I painted the downpipes (well needed it) and the radiator cover .

[extreme3d]

I'm currently cleaning up the disks on my GPZ500s at this very moment!

Here's what I did:

1: First sand/wire brush off the old paint and rust in the centre sections of the disk. Take your time here as a poor finish will only how itself later on

2: Mask of the braking surface of the disk - i used electrical tape as it is easy to stretch it around bends

3: Spray on a light coat of Zinc180 anti rust primer (available from automotive shops). Not too heavy a coat, the objective here is to provent the rust from recurring at a later date but at the same time not to raise the level of the final black coat to much.

4: Let the primer dry and then spray on some black matt paint in several thin coats. Don't rush and try to cover the disk in black paint to quickly - it will take forever to dry and most likely run. The first coat should be a barely there 'dusting'. After a few light coats like that and it will soon start to turn 'black' with a nice even finish. I used high temp paint simply because i had a can lying around. It does give a nice finish as its a very thin paint but make sure you 'bake' the disk in the oven for around 30 seconds to ensure it fully hardens or it will never be a very durable finish to stone chips etc. (200+ C and support the disk by the edges to ensure the paint on the side facing down does not touching the baking tray!!)

[Retro-Man]

what is it with people painting mechanical parts.

I can undertsand the desire to make something look nice but from a technical viewpoint it is totally pointless, such parts as brake discs will develop surface corrosion, it is extremely rare for this corrosion to cause a mechanical problem.

painting these parts can quite often also affect the way in which the part operates, an earlier post talked about painted brake drums on novas. this made me chuckle because many moons ago as a vauxhall technician we would replace brake drums on nova's, cavaliers and astra's on a regular basis because they were warped, and invariably yes these drums had been painted.

just get over it
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[extreme3d]

[Kickstart]

[gsxrpeak]

BBQ black, allways sorts it out!

[syris]

Getting mixed messages here, should I leave it for the moment then or what?

P.S. Picked up the bike today and on second look I suppose, I could live with it...

[Git]

Personally I have painted a good few disc carriers without problem..

[Guest]

[syris]

Right, i'll get it cleaned up first, hasn't been cleaned much by previous owner . I will spend Saturday on it and get back to you all with the results (photos). Cheers.