08-01-2019, 06:31 PM
is the rust on the arch or is it up around the seat belt mounting point. This is an increasingly common issue so I would get it fixed and move on. Carl can probably fix the rust too. Usually its a case of cut it out, weld a new piece in and then underseal it lots and leave. You can fit a liner if you want but NSR liners are rare. Its more likely that it came from the factory without one than it being lost!