For a 25 year old vehicle it was in surprisingly good shape, but did have some rust on the under carriage. Most of the rust seemed to be superficial, but regardless I wanted to wire brush it down and slow the process as much as possible. This took several days of me laying on my back with a chisel and drill mounted wire brush attachments, followed by some phosphoric acid (converts rust to iron phosphate), and a rust reforming paint coat. Still wondering if it was worth all the effort, but it looks better if nothing else. haha.