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

https://jaredhqgg964.clarionvale.com/posts/how-mobile-dent-repair-makes-paintless-dent-repair-faster-and-easier-2

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.