Martin, 17, was handed his chance with regular stopper Joe Anyon out for the rest of the season, but he was unable to prevent Vale from being put to the sword.
Lee Peacock opened the scoring on 16 minutes when he lashed home from 15 yards and Craig Easton doubled his side’s advantage four minutes later as he finished from 10 yards.
Jack Smith got into the act in the 33rd minute when he finished off a flowing move by scoring from 15 yards.
Antony McNamee got in the act in first-half injury time when he smashed the ball home after a fine solo run before Michael Timlin added a fifth before the break when he lashed home from 12 yards.
Subs Ben Joyce hit a late sixth in second-half injury time to complete the rout.