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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Cosmetic Maintenance: Wash, Wax, Detailing, Repairs > Scratches on black paint
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      01-18-2019, 07:27 AM   #1
florincmf
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Scratches on black paint

Good afternoon,

Someone scratched my car the other week on the driver's door. (see picture attached). Is there any way I can fix this at home by following this guy's tutorial. I would love a bit of DIY work to do over the weekend.

(guy's tutorial)

View post on imgur.com
(scratches) If you put your hand over them you don't feel them at all which I believe it means that they're not deep.

Any advice is much appreciated in how I can get this fixed

Regards,
Florin
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      01-18-2019, 07:43 AM   #2
Billfitz
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That's the right method if the scratch is very shallow. Try it, but it should only take a dozen or so swipes with the 3000g to erase the scratch. If it takes more than that the scratch will need filling.
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      01-18-2019, 07:50 AM   #3
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You may be able to use a compound polish and a random orbital polisher. Work from more 'course' to less with the polishes and pads. If you can't feel them, you may be able to get most out with a good polishing.

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      01-18-2019, 08:52 AM   #4
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If you have a RO polisher you can use it instead of rubbing out by hand, but the wet sanding with 3000g is still required with a scratch, otherwise you'll be there for an hour trying to get rid of it with just compound, and still may not succeed. I don't bother using 5000g, as I keep four grades of compound and polish on hand, the most aggressive rendering no need to wet sand with 5000g. I also don't bother to break out my RO for a small scratch, as I can rub it out by hand in just a couple of minutes.
I also start wet sanding with 2000g, following up with 3000g, but I wouldn't recommend 2000g to a newbie, as it can rub right through the clear coat if you overdo it.
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      01-18-2019, 02:58 PM   #5
florincmf
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Quote:
Originally Posted by Billfitz View Post
If you have a RO polisher you can use it instead of rubbing out by hand, but the wet sanding with 3000g is still required with a scratch, otherwise you'll be there for an hour trying to get rid of it with just compound, and still may not succeed. I don't bother using 5000g, as I keep four grades of compound and polish on hand, the most aggressive rendering no need to wet sand with 5000g. I also don't bother to break out my RO for a small scratch, as I can rub it out by hand in just a couple of minutes.
I also start wet sanding with 2000g, following up with 3000g, but I wouldn't recommend 2000g to a newbie, as it can rub right through the clear coat if you overdo it.
So what's the best approach to try this from a newbie perspective? I have a RO polisher, found one on eBay actually.
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      01-18-2019, 04:23 PM   #6
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The only thing different from the video is that you apply and rub out compound and polish with the RO instead of by hand. I use Menzerna products, which are conveniently labeled Step 1, 2 and 3. Step 1 for initial rub out, step 2 for initial polish, step 3 for final polish. Some places sell all three together, for instance:
https://www.amazon.com/Menzerna-400-...85758601&psc=1
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      01-23-2019, 07:37 AM   #7
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Quote:
Originally Posted by Billfitz View Post
The only thing different from the video is that you apply and rub out compound and polish with the RO instead of by hand. I use Menzerna products, which are conveniently labeled Step 1, 2 and 3. Step 1 for initial rub out, step 2 for initial polish, step 3 for final polish. Some places sell all three together, for instance:
https://www.amazon.com/Menzerna-400-...85758601&psc=1
Unfortunately, some of the scratches do not disappear when I spray soapy water over them so probably I won't have any luck in following the tutorial. I might have to go to a specialist despite of being excited to do some DIY on my car.
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