restoring rear wheel arches

[rafael]

How do you restore the rear wheel arches. I understand that there are repair pannels for the outer rear arches. However, I have not seen such repair pannels for the inner rear arches. It is possible to buy a complete inner rear arch, but that has a different price tag.

Is the metal of the inner arch ticker as compared to the outer arch? If not perhaps it is possible to use an outer arch for the inner...