Painting Brake Discs

[nelmo]

Based on the fact that it seems to be the first thing that rusts and it's very obvious, i was considering putting a coat of Hammerite on the central boss of the brake disc (obviously not the braking area) - is that ok to do?

 

I ask only because no-one ever seems to do this - i saw a brand new 5-series that looked great except for the trace of rust already appearing on the disc boss.

[Landie71]

Think you might need some higher temp paint than Hammerite, bit in principle sounds like a good idea. There's quite a few options if you search for high temperature paint on eBay ...... got me thinking now!

[Guest Ian & Carole]

I would say a definite NO . The heat generated will be too much to handle.

[cb750]

I've always painted mine with VHT aerosol paint either silver or black but not where the wheel seats. Never had a problem

[Guest Ian Maycock]

I have used this to good effect. It's supplied in various colours.

 

http://www.frost.co.uk/automotive-paint-coating-electroplating/automotive-paint/por15-caliper-painting-kit-black.html

 

[maccavvy]

Ive done mine with hammerite for years.. hate the rusty bell on the disc.. never had any issues.

[fry61]

Hammerite Smooth Black on ours -- no problem 34,000 miles/3.5years -- but we are old & slow.

 

Slow in typing as well.

Edited July 9, 2015 by florin metal works

[ac01]

Hammeright smooth black on mine no problems. Looks much better than rust!

[Guest 2b cruising]

Gloss stove enamel aerosol.

B&Q.

Cheap. Easy to use and blings like No 10 front door.

[Grim]

I've used stuff similar to hammerite before, and it worked ok

[Guest mower man]

As above Hammerite black /silver never a prob temps on the road are unlikely to get to the point where there is a prob, track days may be different , caliper paint may be another route to follow mick

[maccavvy]

Not the braking area, but less obvious - no paint on the area where the wheel touches the disc either.

 

whys that then....???

[Grim]

Differing paint thickness could cause the wheel not to sit straight and cause vibrations

[ivorbigun]

lots of discs are now coming from the motor factors either lightly painted or zinc plated fitted a set of expensive discs to a range rover sport they were black all over pad area soon went shiny on the test drive.

sprayed mine with a light coat of red oxide for the build ( going to be a while )

[ivorbigun]

yes you are right,

works the same way a grinding wheel is mounted.

something to do with the transference of energy.

I'm sure someone will come up with the full scientific/engineering answer.

I've very lightly painted discs on various cars over the years and never had any obvious problems,

if anything I would say that the expansion of rust between the two surfaces would be more of a problem,

how many people have had to use a large hammer to remove old discs I certainly have.