Weird brown liquid covering paint after track day at COTA

Ferociter · 05-03-2022, 07:23 PM

I was washing my car today after having just returned from COTA but there is some brownish residue on the car that’s very difficult to remove. It looks like some type of liquid. I know it’s from the track because there is no residue in the area where the decal was. Any ideas? See the pic.

Posting it here vs the Car maintenance area as some of you who have been to COTA may know as well?

Thanks,
Tom

ponycar · 05-04-2022, 08:50 AM

It looks like you may have been misted by doing some laps following a car with an oil blow of some kind. If that's the case it is odd that you didn't have an indication on your windscreen. If a rear inner axle seal is going on a Corvette, for example, it will mist down low on a following car. Ask Randy Pobst how it feels in a C5 Corvette when he's doing hot laps and the seal coats the L rear tire.

concrete · 05-04-2022, 08:56 AM

i've also had some very difficult to remove residue on my white car after a rainy track day. i thought more about it and it could've been from fresh asphalt that also had some tar water kick up on the drive there or back. in the end i used a clay bar and lots of elbow grease to get it off. good luck.

Ferociter · 05-04-2022, 07:50 PM

Thanks for the responses - yes, there was some rain and I think it's from the track itself as the front bumper is fine. The residue is only on the sides of the car.

I'll give the clay bar a shot.

N Camarolina · 05-04-2022, 08:39 PM

I appreciate the conversation and thoughts.

I did a wet skid pad the other weekend and I have some residue that isn't coming off with the usual car wash soap. Was hoping to not have to clay it. Oh well.

MatthewAMEL · 05-09-2022, 02:31 PM

What brake pads are you running?

That’s fairly common if you are using Hawks.

Wuiquen · 05-12-2022, 01:08 PM

Get an all purpose cleaner and spray it. Let it dwell for a bit and then use wash mitt with car soap to agitate. Rinse and repeat If needed

Meguiars all purpose cleaner is great...i. An spray it on dried road black tar and it will simply wipe off

Sent from my moto g(7) power using Tapatalk

synolimit · 05-13-2022, 12:30 AM

my tires had fluid leaking out after my first track day. it was running down the side walls about 2" by 2". wonder if it was tire lube when they were mounted and it melted out.

05-03-2022, 07:23 PM	#1
Ferociter Drives: Camaro SS 1LE Join Date: Oct 2020 Location: FL Posts: 12	Weird brown liquid covering paint after track day at COTA I was washing my car today after having just returned from COTA but there is some brownish residue on the car that’s very difficult to remove. It looks like some type of liquid. I know it’s from the track because there is no residue in the area where the decal was. Any ideas? See the pic. Posting it here vs the Car maintenance area as some of you who have been to COTA may know as well? Thanks, Tom Attached Images

05-09-2022, 02:31 PM	#6
MatthewAMEL Drives: 2023 CT5 Blackwing, 2025 C8 Z07 Join Date: Sep 2016 Location: Denver Posts: 1,624	What brake pads are you running? That’s fairly common if you are using Hawks. __________________ 2017 HBM SS 1LE Sold 2023 Wave Metallic CT5-V Blackwing M6 2025 Hysteria Purple C8 Z07

05-12-2022, 01:08 PM	#7
Wuiquen Drives: 2018 Hot Red ZL1 Join Date: Nov 2010 Location: Los Angeles, CA Posts: 3,616	Get an all purpose cleaner and spray it. Let it dwell for a bit and then use wash mitt with car soap to agitate. Rinse and repeat If needed Meguiars all purpose cleaner is great...i. An spray it on dried road black tar and it will simply wipe off Sent from my moto g(7) power using Tapatalk __________________

05-04-2022, 08:50 AM	#2
ponycar Drives: Chevrolet CamaroSS 1LE Join Date: Mar 2022 Location: Virginia Posts: 15	It looks like you may have been misted by doing some laps following a car with an oil blow of some kind. If that's the case it is odd that you didn't have an indication on your windscreen. If a rear inner axle seal is going on a Corvette, for example, it will mist down low on a following car. Ask Randy Pobst how it feels in a C5 Corvette when he's doing hot laps and the seal coats the L rear tire.

05-04-2022, 08:56 AM	#3
concrete Drives: 2017 SS 1LE Join Date: Apr 2019 Location: US Posts: 29	i've also had some very difficult to remove residue on my white car after a rainy track day. i thought more about it and it could've been from fresh asphalt that also had some tar water kick up on the drive there or back. in the end i used a clay bar and lots of elbow grease to get it off. good luck.

05-04-2022, 07:50 PM	#4
Ferociter Drives: Camaro SS 1LE Join Date: Oct 2020 Location: FL Posts: 12	Thanks for the responses - yes, there was some rain and I think it's from the track itself as the front bumper is fine. The residue is only on the sides of the car. I'll give the clay bar a shot.

05-04-2022, 08:39 PM	#5
N Camarolina Drives: 2021 2SS 1LE Join Date: Aug 2020 Location: Cary, NC Posts: 968	I appreciate the conversation and thoughts. I did a wet skid pad the other weekend and I have some residue that isn't coming off with the usual car wash soap. Was hoping to not have to clay it. Oh well.

05-13-2022, 12:30 AM	#8
synolimit Drives: 22 ZL1 1LE A10 Join Date: Feb 2022 Location: Ohio Posts: 233	my tires had fluid leaking out after my first track day. it was running down the side walls about 2" by 2". wonder if it was tire lube when they were mounted and it melted out.

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