Vinegar for rust removal

[1963c-10]

Watched on tv a few weeks ago where a guy used vinegar as a rust remover and decided I'd try the results myself with a pair of the fender to cab brackets. Im fixing to do my front end swap to replace some of the panels that need more repair than I have time for with some rust free OEM panels. I can only guess by the way my other projects have gone that the removal of the original brackets will not go as planned, so I purchased another OEM set from a board member to prep for the swap.
Brackets arrived as described and were complete and solid, just covered in 50+ years of road dirt, paint, dripped bondo, undercoating and grease. Decided that this would be my vinegar project. Used an old plastic coffee tub to hold the parts, 1 gallon vinegar (supplied by local dollar store for $1), and a wire brush. I placed the brackets in and covered them until covered w/vinegar and let them sit a few days. Heres a before pic...