It is recommended to apply perfume just before entering Ihram, and it is recommended to use Musk, and it does not matter if its glistening traces remain
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، عَنِ الْحَسَنِ بْنِ عُبَيْدِ اللَّهِ، حَدَّثَنَا إِبْرَاهِيمُ، عَنِ الأَسْوَدِ، قَالَ قَالَتْ عَائِشَةُ رضى الله عنها كَأَنِّي أَنْظُرُ إِلَى وَبِيصِ الْمِسْكِ فِي مَفْرِقِ رَسُولِ اللَّهِ صلى الله عليه وسلم وَهُوَ مُحْرِمٌ .
'A'isha (Allah be pleased with her) reported: I still seem to see the glistening of musk (in the parting of the head) of the Messenger of Allah (ﷺ) while he was in the state of Ihram.