You can’t use Autosol on the matte black
Formentor exhausts
Those need Cupra to look at replacing tbh.
Agree, but not owning a
Formentor and with the OP’s exhaust tips being extremely dirty due to neglect of the previous owner it’s difficult to tell from the pictures what the finish is. I’ve seen dirty chrome exhaust tips that look very similar - like the ones in the picture below (yes, they are chrome under the dirt and it’s not my car).
Anyway, back to the OP’s corroded exhaust tips; if referred to Cupra, they may well say the corrosion is due to neglect of the previous owner rather than being due to a warrantable defect.
IMHO it shows the importance when washing a car not to overlook exhaust tips, painted brake calipers, alloy wheel barrels, and ‘hidden’ areas such as car door shuts, underside edges of bonnet and tailgate, edges of doors behind rubber sealing strips, behind fuel filler flap etc. as the accumulation of dirt can hide a multitude of potential issues.