Subframe: take it apart, blast it, cut out any areas where the metal is too thin/perforated, weld in fresh steel, then get the whole thing powder coated, press in new bushings all round, put it back together.
Floor: grind back, then reseal with a suitably tough paint.
Subframe: take it apart, blast it, cut out any areas where the metal is too thin/perforated, weld in fresh steel, then get the whole thing powder coated, press in new bushings all round, put it back together.
Floor: grind back, then reseal with a suitably tough paint.
Brake pipes just get replaced.