polish up
US /ˈpɑː.lɪʃ ʌp/
UK /ˈpɑː.lɪʃ ʌp/

1.
memoles, menyempurnakan
to improve something by making small changes to it
:
•
You need to polish up your presentation skills before the conference.
Anda perlu memoles keterampilan presentasi Anda sebelum konferensi.
•
She spent hours polishing up her essay.
Dia menghabiskan berjam-jam memoles esainya.