It appeared at one stage as thought the France international's days at Old Trafford may be numbered as he struggled to earn regular game time under a Portuguese coach.
He is, however, among those to have been rejuvenated by Ole Gunnar Solskjaer, with two goals and an assist recorded as part of a side which has rediscovered its spark.
Martial’s efforts, and a show of faith from a new boss, have seen him extend his stay at United through to 2024.
Former United star Scholes is delighted with that deal, with securing the 23-year-old’s future considered to be as important as any new faces – with no arrivals welcomed during the January window.
“It's brilliant, he was another player who struggled under previous manager,” Scholes told Radio 5 Live.
“We all knew his qualities, I remember talking to [Dimitar] Berbatov, who played at Monaco with him, and he was raving.
“You need a run of games to express yourself and now he's getting that, he can beat a man, score goals, bring excitement for the fans and that's the most important thing. It's a great signing.”
While Martial was prevented from heading out of Old Trafford any time soon on deadline day, Marouane Fellaini moved a step closer to securing a move elsewhere.
The 31-year-old will leave United with 177 appearances to his name, but he never truly convinced after making a big-money transfer from Everton and Scholes is not surprised to see him following Mourinho through the exits.
The Red Devils legend added: “I don't think it ever really worked out as him and club would have liked. At what he does he's brilliant, a nightmare to play against.
“He's an option for last 15 minutes, Ole doesn't see that he likes to play football and not part of his plans. He's a great lad, great footballer and great around the dressing room.”