looking at the pre red oxide photos the rear arches look good and its rust free! clean car.
remember, the doors come off with pins and the windows push out, all leaving and easily maskable lip. fiesta mk1/2s are the easiest car ever to respray. assuming you have already prepared the car before applying red oxide, get it sanded and prepped then just run it down to a clean dry unit with a compressor and get some coats of paint on it.
get a thick layer down and you can cut it down until it looks good.
car has potential.