Door sill plates getting white?

tboooe · 03-04-2016, 03:38 PM

Hi guys, I noticed the black door sill plates are beginning to turn white in certain area. I've tried to clean them using all sorts of mild cleaners and soaps but nothing seems to work. Any ideas?

stormlv · 03-04-2016, 04:01 PM

I used a bit of silicone solution and it seems to help.

tboooe · 03-04-2016, 04:21 PM

Thank you. What is silicone solution?

stormlv · 03-04-2016, 05:37 PM

Quote:

Originally Posted by tboooe

Thank you. What is silicone solution?

I use something like this: http://wd40specialist.com/products/silicone-lubricant/

RoundelM3 · 03-05-2016, 08:39 AM

Try Mother's Back To Black, available at most auto parts stores. It's designed to restore black plastic trim to original condition; has worked great for me on previous cars with black bumper strips, etc.

G30 B58 · 03-05-2016, 08:44 AM

Stop cleaning them so aggressively?

Billfitz · 03-05-2016, 10:25 AM

Quote:

Originally Posted by stormlv

I use something like this: http://wd40specialist.com/products/silicone-lubricant/

The usual reason for black plastic parts going white is waxes and polishes, which can have a chemical reaction with plastic. A silicone lube can prevent the wax/polish from adhering to the plastic, so no reaction occurs. But it will also prevent the wax/polish fro adhering to the paint that you want it adhered to, so you have to be careful when applying it.

tboooe · 03-05-2016, 10:38 AM

Quote:

Originally Posted by F32 N55

Stop cleaning them so aggressively?

The thing is I only clean them when I wash my car so I am not using an aggressive cleaners. I have applied some Gtechniq surface protection which I have done on all my other cars' plastic bits without this problem.

So is the plastic doomed to have these white spots or is there something I can do to restore it?

03-04-2016, 03:38 PM	#1
tboooe Brigadier General 925 Rep 3,089 Posts Drives: F36 428i GC, E36 M3 - gone :( Join Date: Dec 2014 Location: The OC! iTrader: (1)	Door sill plates getting white? Hi guys, I noticed the black door sill plates are beginning to turn white in certain area. I've tried to clean them using all sorts of mild cleaners and soaps but nothing seems to work. Any ideas? __________________ My build thread 2015 428i GC - Alpine White - Coral Red - M Sport
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03-04-2016, 04:01 PM	#2
stormlv Human 932 Rep 1,200 Posts Drives: Yes Join Date: Nov 2013 Location: Geneva iTrader: (1)	I used a bit of silicone solution and it seems to help. __________________ 2023 BMW M4 CP xDr \| 510HP / 650Nm \| Isle of Man Green \| Photo album Sold 2018 BMW M4 DCT / ZCP\| 450HP / 550Nm \| Sakhir Orange \| Photo album \| Tribute Sold 2014 BMW 435xd \| 360HP / 710Nm \| Estoril Blue \| Photo album 2010 BMW Z4 sDrive35i DKG \| 306 HP / 400Nm \| Space Gray \| Photo album
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03-04-2016, 04:21 PM	#3
tboooe Brigadier General 925 Rep 3,089 Posts Drives: F36 428i GC, E36 M3 - gone :( Join Date: Dec 2014 Location: The OC! iTrader: (1)	Thank you. What is silicone solution? __________________ My build thread 2015 428i GC - Alpine White - Coral Red - M Sport
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03-05-2016, 08:39 AM	#5
RoundelM3 Major General 1835 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	Try Mother's Back To Black, available at most auto parts stores. It's designed to restore black plastic trim to original condition; has worked great for me on previous cars with black bumper strips, etc. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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03-05-2016, 08:44 AM	#6
G30 B58 Pace Car Driver 1548 Rep 3,164 Posts Drives: '22 AW G30 B58 M-Sport Join Date: May 2014 Location: my garage in PA iTrader: (0)	Stop cleaning them so aggressively?
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