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Car detailing/Paint experts - Need help removing PAINTED pinstriping!

Originally Posted by OTW Z-Boy Time to call the Junkman... Sent from my iPhone using Tapatalk Ahh, that explains the spotlight in town, shining the outline of a PC orbital

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Old 07-01-2019, 08:43 PM   #16 (permalink)
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Originally Posted by OTW Z-Boy View Post
Time to call the Junkman...


Sent from my iPhone using Tapatalk
Ahh, that explains the spotlight in town, shining the outline of a PC orbital polisher onto the clouds.

Sent from my SM-G955U using Tapatalk
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Old 07-01-2019, 10:17 PM   #17 (permalink)
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Holy carnauba wax, Junkman!
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Old 07-01-2019, 10:22 PM   #18 (permalink)
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Okay, here's the deal.

You're dealing with PAINT on top of CLEARCOAT.

You don't use paint thinners to remove paint from your clearcoat, unless the paint has just been spilled onto the clearcoat and it is still WET. Obviously, years of baked on pinstriping is NOT going to come off with paint thinner.

You don't use clay to remove paint.

Consumer clay is used for removing CONTAMINATION ON THE PAINT. You don't use clay to remove PAINT. That was a complete waste of time and money. Clay can be used to remove VERY LIGHT OVERSPRAY, but that stuff has not adhered to the paint so it can easily be removed a couple of different ways.

The only way to remove pinstriping is WET SANDING, NOT DRY SANDING, and I DO NOT recommend ANYONE with no wet sanding experience to try and do so. If you pay a professional to do it and your clearcoat fails in the future, you have a recourse. If YOU do it and your clearcoat fails, you have a paint shop to pay. With that said, 1000-grit sandpaper is GOD AWFUL AGGRESSIVE, and will require a decent polisher (like the Flex-3401VRG or similar), along with an aggressive COMPOUND (like the 3M Rubbibg Compound), in order to remove that sanding damage. The PC-7424XP is NOT going to fully remove 1000-grit sandpaper damage. Using 1000-grit sandpaper is going to eat up some clear coat VERY fast and strikethrough can easily happen, especially if you don't know what you are doing. Add to that, they don't put enough clear-coat on the Z to be experimenting on one without knowing what you are doing. I've worked on a few so I have firsthand experience with the lack of clear that they use.

1500-2000 grit is all that I would have tried on a factory painted Z, going slow as I go and paying close attention to how much clearcoat that I am removing. Since I would be WET SANDING, I can easily see how much clearcoat I am removing. Since the stripping is ON TOP of the clearcoat, you are going to want to remove THE LEAST amount to NONE of the clear coat that is on the car, as clearcoat is the LAST thing you want to cut off the car in this situation. You want as much of that stuff to remain on the car as possible for obvious reasons.

This is why you pay a professional to do professional type work. In the long run, paying someone to fix something like this is a hell of a lot cheaper than painting the entire car, which is what you will have to do if the clearcoat fails in the future.

We all like being able to work on our cars but some things, like rebuilding the transmission is something I won't screw with no matter how good someone's instructions are. Hell, I have the dealership service manual to my car, which clearly explains how to fix EVERYTHING on my car and there are still plenty of things that I won't try. Advance paint maintenance takes instruction and experience. You start on a hooptie, not your Z.

So if you want my advice, let a professional remove those stripes, if you can find someone bold enough to do so. Good luck with that though because when you tell them that you've already started the process, they may shy away. If they do, thank them because that's a sign of someone who doesn't want the future of your clearcoat on their hands or they are too lazy to do the job without painting the entire car, which is probably what a dealership would tell you.

Whatever you do, don't take it to a dealership.
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Old 07-01-2019, 10:25 PM   #19 (permalink)
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Da-na-na-na-na-na-na-na JUNKMAN!
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Old 07-01-2019, 10:35 PM   #20 (permalink)
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Lol! You silly!
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Old 07-02-2019, 08:13 AM   #21 (permalink)
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Quote:
Originally Posted by Junkman2008 View Post
Okay, here's the deal.

You're dealing with PAINT on top of CLEARCOAT.

You don't use paint thinners to remove paint from your clearcoat, unless the paint has just been spilled onto the clearcoat and it is still WET. Obviously, years of baked on pinstriping is NOT going to come off with paint thinner.

You don't use clay to remove paint.

Consumer clay is used for removing CONTAMINATION ON THE PAINT. You don't use clay to remove PAINT. That was a complete waste of time and money. Clay can be used to remove VERY LIGHT OVERSPRAY, but that stuff has not adhered to the paint so it can easily be removed a couple of different ways.

The only way to remove pinstriping is WET SANDING, NOT DRY SANDING, and I DO NOT recommend ANYONE with no wet sanding experience to try and do so. If you pay a professional to do it and your clearcoat fails in the future, you have a recourse. If YOU do it and your clearcoat fails, you have a paint shop to pay. With that said, 1000-grit sandpaper is GOD AWFUL AGGRESSIVE, and will require a decent polisher (like the Flex-3401VRG or similar), along with an aggressive COMPOUND (like the 3M Rubbibg Compound), in order to remove that sanding damage. The PC-7424XP is NOT going to fully remove 1000-grit sandpaper damage. Using 1000-grit sandpaper is going to eat up some clear coat VERY fast and strikethrough can easily happen, especially if you don't know what you are doing. Add to that, they don't put enough clear-coat on the Z to be experimenting on one without knowing what you are doing. I've worked on a few so I have firsthand experience with the lack of clear that they use.

1500-2000 grit is all that I would have tried on a factory painted Z, going slow as I go and paying close attention to how much clearcoat that I am removing. Since I would be WET SANDING, I can easily see how much clearcoat I am removing. Since the stripping is ON TOP of the clearcoat, you are going to want to remove THE LEAST amount to NONE of the clear coat that is on the car, as clearcoat is the LAST thing you want to cut off the car in this situation. You want as much of that stuff to remain on the car as possible for obvious reasons.

This is why you pay a professional to do professional type work. In the long run, paying someone to fix something like this is a hell of a lot cheaper than painting the entire car, which is what you will have to do if the clearcoat fails in the future.

We all like being able to work on our cars but some things, like rebuilding the transmission is something I won't screw with no matter how good someone's instructions are. Hell, I have the dealership service manual to my car, which clearly explains how to fix EVERYTHING on my car and there are still plenty of things that I won't try. Advance paint maintenance takes instruction and experience. You start on a hooptie, not your Z.

So if you want my advice, let a professional remove those stripes, if you can find someone bold enough to do so. Good luck with that though because when you tell them that you've already started the process, they may shy away. If they do, thank them because that's a sign of someone who doesn't want the future of your clearcoat on their hands or they are too lazy to do the job without painting the entire car, which is probably what a dealership would tell you.

Whatever you do, don't take it to a dealership.
Thank you for this! As a side note with the small areas I wet sanded, I used a small strip with light pressure for no more than probably 5-10 seconds until the paint was gone if that's any recourse. I am going to look for a reputable autobody/paint shop near me and see what they can do though.
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Old 07-02-2019, 10:40 AM   #22 (permalink)
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Wet sanding is an artform and you only get one chance to screw it up. I've done quite a few videos on wet sanding, here's just one. The key here is MY TECHNIQUE. The products that I used were products that the car's owner had sitting in his garage. So don't get caught up in WHAT I used, pay close attention to HOW I used the items that I used.

TECHNIQUE TRUMPS PRODUCT 24/7/365.

I have a lot of guys who want a product list when I could have used a hundred different products that they probably already have sitting in their garage so keep that in mind whenever you see me break out a buffer because there are multiple brands out there that will take you to Shineville and I am NOT a product snob. Learn how a product works (the science behind the product, SMAT, DAT, etc...), and then learn how to use that product. If you understand how a product works, then you can pretty much pick up ANY similar product and get the same exact results. This is why you see me using so many different brands in my videos. You don't have to pay some jacked up price for one product when a similar product that cost $10 less will do the job just fine.

Here we go!

http://www.youtube.com/watch?v=-n9AZFYfH-E
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Last edited by Junkman2008; 07-02-2019 at 11:00 AM.
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