roof stains

[johng]

I recently had a car cover leak causing some staining of the white paintwork on the roof of my GTI.

I have tried car polish and a clay bar, without success.

Is anyone able to recommend a particular product to get rid of these annoying stains.

Thanks

[Mrk_Mickey]

Cutting compound maybe...

*shrugs* not too sure

[DMS_Dan]

Got pics of the area?