Strange Mark on Paintwork

almas09

Active Member
Jul 31, 2017
71
8
Hi All,

Just washed my Cupra over the weekend and came across a mark near the rear passenger side door. Tried to wipe it off with Meg's quick detailer after the wash but wouldn't clear at all. Any ideas on what it might be?

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image2_zpsqo0qcf0u.jpeg
 

nokiauk

Full Member
Feb 9, 2003
524
25
Edinburgh
Looks like some kind of etching, I’d try a clay bar or perhaps a light paint restorer and see if that works.
 

paddy6789

Moderator
Staff member
Moderator
Aug 31, 2016
1,627
1,080
Preston, Lancs
Could it be a very acidic bird dump that was there before the wash?

I’ve seen it before where if left on the paint for a fair while, it can cause some marks like you’ve got


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SRGTD

Active Member
May 26, 2014
2,414
1,298
Looks like some kind of etching.

It does look like severe etching of the lacquer coat caused by bird poo.

I doubt that claying will improve it - claying will remove embedded contaminants, but if it’s the lacquered surface that’s etched, there’s nothing embedded to remove.

Machine polishing with an appropriate combination of pad and polish should remove it - that’s assuming you are dealing with etching. I’ve successfully corrected quite a large area of etching caused by a pigeon using my car for target practice on a very hot sunny day. The pigeon poo baked hard on the car (was only on the car for no more than a 1/2 hour), and after soaking it and carefully removing it, there was some serious etching. After 15-20 minutes with my DA polisher, all signs of etching were removed.
 

Trout

Active Member
Feb 28, 2018
56
18
It does look like severe etching of the lacquer coat caused by bird poo.

I doubt that claying will improve it - claying will remove embedded contaminants, but if it’s the lacquered surface that’s etched, there’s nothing embedded to remove.

Machine polishing with an appropriate combination of pad and polish should remove it - that’s assuming you are dealing with etching. I’ve successfully corrected quite a large area of etching caused by a pigeon using my car for target practice on a very hot sunny day. The pigeon poo baked hard on the car (was only on the car for no more than a 1/2 hour), and after soaking it and carefully removing it, there was some serious etching. After 15-20 minutes with my DA polisher, all signs of etching were removed.
As SRGTD says and my own experience suggests, machine polishing is probably the only way you'll remove the etching.
 
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