Finn was unable to recreate the complex rhythmical patterns of his predecessor, Steve Peregrin Took, and was effectively hired as much for a visual foil for Bolan as for his drumming.

'"[1] Mickey Finn stated, on a radio show in Denmark on which he and Marc Bolan were appearing as guest DJs, that his big influence in percussion was the prolific Master Henry Gibson from Curtis Mayfield's band.

Something of a character both on and off stage, Finn was often to be seen wearing a hat (including a green bowler), a trademark that was adopted by a significant proportion of T. Rex fans.

During the late 1980s and early 1990s, Finn made a handful of guest appearances with the West London rock band, Checkpoint Charlie, fronted by Mick Lexington.

[1] In 2020, Finn was posthumously inducted into the Rock and Roll Hall of Fame as a member of T. Rex with Bolan, Steve Currie and Bill Legend.