Mysterious mark in paint. Possible cause?

[Kiwi79]

A relative is looking at a used car and has found one they like but there is a slightly odd mark on the door paint, almost like a thin run mark or something solvent based has been spilt on it and made a mark underneath. It didn't wipe of with a soft cloth. Any ideas from the PH brain as to what it may be?It's not massive noticeable but curious if it could indicate something underlying.

Thanks

[Defcon5]

That’s where the front half of one car was welded to the back half of another

Can you feel it? Are you sure it’s not just a water mark from water coming out of the wing mirror (looks like the front passenger door?)

[scorcher]

TFR mark

[grudas]

water spotting.. in hard water areas you get that a lot. Car gets washed, residual water runs out and leaves a mark. It wipes off with a detailer etc but a cloth won't take it out.

[Chubbyross]

It does look like a stubborn water mark. Koch Chemie FSE will remove it if it is water. If it’s something nastier five minutes with a machine polished will remove it. If it’s some easier nastier and it’s gone through the clear coat then you’re looking at a respray.

I’d start with the FSE. Give it a quick spray, leave it for ten seconds then try wiping off.

[Draxindustries1]

That needs stripping back to bare metal and given a complete windows out repaint, it's the only way to be sure..

[Kiwi79]

Thanks for all the replies have passed them on. Much appreciated

[Caddyshack]

scorcher said:

TFR mark

It does look like a harsh chemical may have done it.