I lost the rear wiper cover for my Alfa Romeo Mito and needed a replacement. It looks like a common design for various car brands and might also fit for others (not tested). I am happy for feedback and like to hear if this fits (or not) for other brands as well.
Depending on your surface stickiness you might need to add a brim (I like to use 5mm).
The bottom of the model is slightly tilted, therefore you need to lay it flat.

For a cleaner looking top surface, use the variable layer height. I used 0.15mm for the top layers (green) and 0.2mm as default layer height (gray).

Prusa Slicer 2.5.0
The author marked this model as their own original creation.