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Old 20-05-2018, 09:53 PM   #1
vw754
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help with da polishing

Ive polished about 4 cars using my d.a ive tried different pads (all from china) ive used their most aggressive pads,used megs ultimate compound,megs 105,and a couple from autobrite direct..........a get a very good finish,but i cant seem to remove sanding marks ,i can fade them out but cant get rid of them after using 1500/2000/2500 grade.

what am i doing wrong?

im doing a good 5-6 passes but unfortunatley cant get rid of them,if i find a mark/blemish i can wet sand it,get a shine back up,but i can still see sanding marks.

it is audi paint,and with it being black...........well you know what i mean,always finding new mars/blemishes lol
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Old 20-05-2018, 10:35 PM   #2
Benfr16
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I have no experience in wet sanding but I am sure those who have the knowledge would appreciate some pictures (I use flickr to upload pics then click share and use the bb code function)

I hope you find the answers you need!
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Old 20-05-2018, 11:17 PM   #3
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You sure you've not gone through the clear?
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Old 20-05-2018, 11:48 PM   #4
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Originally Posted by Coupe25 View Post
You sure you've not gone through the clear?
100% no.

its not one car ive tried on its 2 and still same results,no pics as they were just family cars,the sanding marks are only visible when very close..........is it the cheap chinese pads?,i find megs 105 not doing anything cut wise.
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Old 21-05-2018, 07:11 AM   #5
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To deep,if you can feel it with your nail.
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Old 21-05-2018, 08:02 AM   #6
AndyN01
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The same as Benfr16 i have very little experience of sanding marks but I would say always use quality stuff.

Maybe the Chinese pads are great but I'd go for Scholl Spider pads or Lake Country Hydrotechs or some other well known, reputable pads from one of our forum supporters.

Maybe teaching granny to suck eggs but have you watched the Junkman videos and read Dave KG's article?

http://www.detailingworld.co.uk/foru...d.php?t=281047

http://www.detailingworld.co.uk/foru...ad.php?t=63859

Good Luck with it.

Andy.
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Old 21-05-2018, 08:13 AM   #7
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More to the point, why did you have to wet sand the paint in the first place?
Audi paint is usually quite hard so 105 plus a cutting pad from say CG's Hex Logic range should have shifted any blemishes that existed.
A quick question, but did you use a Paint Thickness Gauge to check the paint depth first, then to see how much paint you've removed?
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Old 21-05-2018, 07:57 PM   #8
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to deep,if you can feel it with your nail.
cant feel them at all
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Old 22-05-2018, 11:14 AM   #9
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Are you sure your not seeing prep lines (caused by poor prep) which are in the undercoat beneath the paint?
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Old 22-05-2018, 11:54 PM   #10
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Are you sure your not seeing prep lines (caused by poor prep) which are in the undercoat beneath the paint?
cars in original paint
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