PDR is especially effective on smooth, shallow dents where the metal has flexed rather than folded sharply

https://donovaniqsr350.cavandoragh.org/paintless-dent-repair-explained-how-pdr-works-and-why-it-beats-traditional-body-work

PDR is especially effective on smooth, shallow dents where the metal has flexed rather than folded sharply, allowing technicians to return the panel to its original contour.