What can i use for the inner arches?

Autosmart G101 simone.

But like mine, your low enough for no one to be able to see the arch :wink:
 
Meguiars APC will also do a good job.

There will be loads of tar in the arches though, will need some autosmart tardis for that but I think you already bought some?
 
Im about to do this aswell, been loads of roadworks recently so im sure my arches weigh triple what they should