Have any of you painted the brake discs before?

I've got some drilled and grooved discs but I've noticed when I've fitted others the edges go very rusty straight away as well as the hub part.

When you buy Pagid Brake discs they come painted in silver, when you brake the first few times it rubs off so the braking surface goes clean but the hub and the edges stay silver.

Can you get paint to spray over the discs and do the same thing then?

Manifold (grey) paint might work as I'd not think that there is anything resembling the protective coating that the brake disc people use - has the name Geomet not got some connection to that coating?  Stopping the rust marking/breaking through will be tricky, so far I've failed to make daughter's rear drums stay looking good!!

Try cold galv spray, it's basically just zinc in an aerosol can.

I do have some zinc spray paint but it's very thin and watery.

I was thinking of silver manifold paint but that only does temps of 650°

How hot do brake discs get... I imagine very hot in heavy braking situations.

Assuming your only painting the edges? 

Make sure you cover all the disc surface and brake pad to stop the rust 

 

Red adds 2hp extra 

 

Just the look im going to go for!

I do have some zinc spray paint but it's very thin and watery.

I was thinking of silver manifold paint but that only does temps of 650°

How hot do brake discs get... I imagine very hot in heavy braking situations.

 

Try shaking the can properly  :sun:

Try shaking the can properly :sun:

It was shaken plenty, it's just a thin paint I guess.

So the discs got soaked in acid to remove any dirt, oil and grease and got two coats of the zinc spray I've got (after shaking it very well!)

They came up ok, only really want the hub part and very edge of the disc doing but just sprayed most of it.

Just need to lightly rub over the braking surface to get the thick of it off, the rest should clean up once I've used the brakes a few times.

Looks pukka Hutchy, looks exactly how my Brembo Max discs came when new.

It was shaken plenty, it's just a thin paint I guess.

 

In my case, I've saved my spray can of zinc paint for far too long, I don't think shaking it would do anything, it should really go in the bin or get cut open and brushed on!

It helps to make a rough template

Turns out like this. I use turps on a rag to remove most of the excess paint off the friction surface & clean the oily residue off with methylated spirits. I don't like the paint contaminating the friction material.

Note that you also want to avoid too much paint on the hub where the wheel clamps on.

Edited 20 December, 201510 yr by brad1.8T

I had a template similar to that

Spend a couple of minutes making it then decided to just spray most of it hoping it might help the drilled and grooved parts not rust as well.

Like I say I'll clean up the braking surface with sand paper before fitting, I'm not worried about some paint dust contaminating the pads or anything either really, I'm sure it will burn off.

What paint did you use?

I had a template similar to that

Spend a couple of minutes making it then decided to just spray most of it hoping it might help the drilled and grooved parts not rust as well.

Like I say I'll clean up the braking surface with sand paper before fitting, I'm not worried about some paint dust contaminating the pads or anything either really, I'm sure it will burn off.

What paint did you use?

 

Wheel Silver enamel I had sitting on the shelf.  Most people should use VHT engine paint but I know how I drive and I rarely get any heat in the brakes so I can get away with it