This was taken from a late 50's, 2x3 inch Polaroid that was scanned at 1200 dpi and enhanced primarily by sharpening and tonal adjustment.
Normally, scanning a print at that resolution would be gross overkill but that Polaroid contained a wealth of salvageable detail.
With minimal modifications, it printed extremely well at 8x10 inches and was used at a museum for a 36x52 inch display.

Remarkably, this derelict 1930 Cadillac was purchased and restored to true concours condition. It was patiently and lovingly worked on for decades to achieve this.