i think wat you should do first is fix the rust on the rockers.
Then remove the corners and headlights and get proper ZKW/depo/bosch brand and get orange indicators.. You will see a big difference at the front.
if it was up to me all i'd do is get coilovers and some nice wheels, and that's it
2000 Audi A8 SWB Silver/Black
1992 BMW 525iT/5 White/Blue [MPars, HIDs, cargo net]
1989 525i [scrapped]
1995 BMW 318i DASC [sold]