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Coating brake calipers and rotors/drums


Rich1

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My body shop is sending out suspension pieces to sand blast and will be coating them in por 15 semi gloss black..They asked if I wanted to paint/coat the brake calipers and rotors/drums. Any thoughts on this? Will this hinder brake performance? If so, is there another to improve the look of these rusty brake components?

Thanks

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I used a product from G2 recently. It is made for calipers. You can see more info about them here:

http://www.g2usa.com/

I went with a silver color and mine came out great. My only issue is that you cannot see them through my wheels like you can on more modern cars with modern wheels.

Here's a few pictures of the G2 product on my calipers.

post-19584-14150818357555_thumb.jpg

Mike.

post-19584-14150818356301_thumb.jpg

post-19584-14150818356834_thumb.jpg

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If you're worried about heat problems, then you'd be better off switching to iron brake drums. they're said to handle more heat them the stock aluminum ones and don't deform when hot.

The only thing I've noticed with painting the drums is that you can see the impression from wheels when you take them off. It's just a little unsightly, but you won't see it with the wheels on.

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You don't build enough heat during an autocross run for it to make a difference. Fade would come from a 20 minute track session or a bit of canyon carving. Trust me on this. Coming around turn ten at Brainerd International Raceway and finding your brake pedal going all the way to the floor is not the excitement you signed up for...

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The additional heat insulation provided by caliper paint is probably not measurable. I've noticed no difference with an IR heat gun shooting painted, bare metal, or rusty 204Z front calipers - although I wasn't specifically testing for that. With controlled testing you might be able to show a difference but, IMHO, its not significant. On a race track the front calipers got so hot that most paint just cooks away (I've seen 800 degrees after a 1 hour track stint during an eduro). Same is true with the rear aluminum drums if the brakes are adjusted properly. For a street driven car its not an issue.

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I have used that kit before. I wouldn't exactly recommend it but it gets the job done. It started to peel off after about a year. You have to brush it on instead of using a spray can, and it's not as smooth looking compared to the finish Mike W has on his.

Chase

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The G2 product that I mentioned above is a 2 part epoxy paint that you also brush on. Once mixed you have about 3-4 hours to finish the job which was plenty of time for 2 complete coats.

They came out very nice and although I have only had them back on the car now for a few months, I have not seen any signs of degradation of the paint itself. So far, so good.

Mike.

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Paint insulation is negligible in this case. It's like peeing in the ocean...unless you are either Paul Bunyan, or painting with asbestos, it won't make a difference. LOL

Edited by cygnusx1
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Thanks Chase & Mike W for the feedback. Reading Amazon review, most customer recommend to buy better bristles brush and not to use the brush comes with the kit.

Other reviewer mentioned G2 is more durable compare with this Dupli-color.

I have used that kit before. I wouldn't exactly recommend it but it gets the job done. It started to peel off after about a year. You have to brush it on instead of using a spray can, and it's not as smooth looking compared to the finish Mike W has on his.

Chase

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Thanks for all of the responses...

Another option is to just replace these 40 year old pieces with rebuilt calipers and new rotors. Anyone tried the slotted rotor upgrades from Motorsport Auto or Z Car Source?

Edited by Rich1
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The additional heat insulation provided by caliper paint is probably not measurable. I've noticed no difference with an IR heat gun shooting painted, bare metal, or rusty 204Z front calipers - although I wasn't specifically testing for that. With controlled testing you might be able to show a difference but, IMHO, its not significant. On a race track the front calipers got so hot that most paint just cooks away (I've seen 800 degrees after a 1 hour track stint during an eduro). Same is true with the rear aluminum drums if the brakes are adjusted properly. For a street driven car its not an issue.

John,

The real test is in how long it takes to the heat to get out, not how hot they get. I would test each at 10 minutes 20 minutes and half an hour. The hypothesis being that it takes longer for the heat to get out of the painted caliper. I agree though, on a street car it isn't an issue.

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  • 1 year later...
  • 2 months later...
Let us hear from you if you have had your calipers paint for more than two years - is it holding up - what brand did you use - would you do it again?

I used the G2 kit on my Mazdaspeed3 daily driver and it's in great shape after three years, including one track day during which the front calipers got hot enough to scorch off a vinyl "mazdaspeed" sticker I had applied over the paint, but the paint itself has held up perfectly. It is black paint so it probably shows wear/damage less than a brighter color would, but as far as I can see it's been a great product.

That being said, I do not plan on painting a set of calipers again. Cleaning old grungy calipers on the vehicle is just too labor intensive & messy. I suspect part of the reason my Mazda's paint has held up so well is due to extensive cleaning and prep. For my Z it's a different story since everything's coming apart, so the calipers will be sandblasted and powder coated like my other suspension parts.

Edited by bacarl
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  • 2 months later...

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