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Old 10-06-2015, 07:52 PM   #1 (permalink)
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Wet Sanding. Please Help.

Hello 8th, I've gotten myself into a situation that I was hoping you could help resolve. To start, I was attempting to fill in some paint chips so I found a video for a guide. I was attempting to emulate this video.

https://www.youtube.com/watch?v=6xi3xmeO6C4

So first I tried this on a scratch that I was filling in on my rear bumper. I wet sanded with 2000 grit paper and followed up by hand polishing with Turtle Wax brand polishing compound and then Turtle Wax brand hard shell wax. Everything seemed great and shiny when I finished so I decided to follow up on the chips on my hood and front fenders. Here's my issue.

I did the same thing as the back bumper, but the areas I've wet sanded are considerably duller now. I've come to realize there are some differences in the paint used on the plastic bumper and the metal body panels. Just a detail, but the paint still feels very smooth, so I don't think there are any deep scratches or anything.

So what should I do to recover this?
  • Follow up with a 3000 or 4000 grit paper and polish again?
  • Just spend more time polishing? Maybe since I don't have that radial polisher like in the video it might just take me longer.
  • Crash into something and get a new front end with insurance?

I'll be sure to get a pic up in the morning when I have some sunlight.


Last edited by SiBurtonGuy; 10-07-2015 at 10:18 AM.
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Old 10-07-2015, 08:28 AM   #2 (permalink)
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Find a buddy with a DA polisher. You aren't going to clean it up buffing by hand. Need more poowwaaaa!

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Old 10-07-2015, 10:16 AM   #3 (permalink)
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Any opinions on this Meguiar's buffer that attaches to a power drill? Seems like it would be considerably more effective than just hand polishing without having to spend too much.

http://www.amazon.com/gp/product/B009OBVRY4?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00 http://www.amazon.com/gp/product/B009OBVRY4?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
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Old 10-07-2015, 11:24 AM   #4 (permalink)
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There's no idiot proofing since it's controlled by your finger. You may burn through your paint or do more damage just like a rotory buffer. A DA buffer will stop spinning/functioning if too much downward pressure is applied.

Try your best to find someone with a DA and Megs 105/205.
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Old 10-07-2015, 02:10 PM   #5 (permalink)
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doing it by hand you could sand it down a bit more, will make it easier to get the scratches out.

Honestly, you also probably aren't using enough pressure or force. Imagine a DA, its spinning fast, using abrasive pads and polish and generating a bit of heat, now try to do that with your hand. You will need to put in some serious elbow grease.

Your first mistake was trying wet sanding without help of a professional, even a lot of "pro" detailers will F up your paint doing it". Get a DA or borrow one and get some good polish, like M105 from meguiars stated above.
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Old 10-07-2015, 02:14 PM   #6 (permalink)
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Thanks for the advice. I'm looking to purchase a DA. Seems like I just can't get enough work done by hand to polish it out.
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Old 10-09-2015, 10:53 AM   #7 (permalink)
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OK my Meguiar's DA system came in the mail yesterday. Will post the results.
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Old 10-11-2015, 08:21 PM   #8 (permalink)
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The Meguiar's DA system was just what I needed to buff out the wetsanding marks.
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Old 10-15-2015, 09:52 AM   #9 (permalink)
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Careful, it's contagious. You'll start to notice small imperfections in your car's paint, and before you know it, you have a couple shelfs in the garage dedicated to detailing products.
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Old 10-15-2015, 10:30 AM   #10 (permalink)
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Well I've already decided that I'm repainting my hood in the spring. I have so many little chips and I can't stand it.
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Old 11-11-2015, 10:38 PM   #11 (permalink)
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2000 grit isn't fine enough. Basically your clear coat has died back and the 2000 grit scratches are visible again. Wet sand with 3000 then 5000 with a DA, then buff with compound and polish.
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Old 11-11-2015, 11:17 PM   #12 (permalink)
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Quote:
Originally Posted by black_ex View Post
Honestly, you also probably aren't using enough pressure or force.
I would advise against using excessive pressure hand sanding. The grits when using a DA are being scratching across the surface, where as if you putting more downward pressure you're digging the grits into paint making it more likely to burn through (especially on body lines).
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