You might remember Amy Humphries, also known as Humpasaurus, from her excellent Willow Rosenberg costume. She’s talented at making costumes obviously but also at applying makeup to mimic whichever character she’s cosplaying. She recently shared her first pic of a cosplay test for Hermione Granger. She did a great job capturing the look of Hermione in the films and mentioned she covered her own brows with glue and concealer and brushed these brows on.
The photo represents the result of the first makeup test. She’s already achieved a close likeness, but Humphries says she still has a long way to go. Why test makeup and cosplay before the big day? The makeup and wig is a big one. You should make sure you can nail the makeup look you want before the convention. Practice, try materials to make sure you don’t have any sort of weird allergic reaction, use YouTube videos if needed, and get it right. Try to leave the makeup on over the course of a day to see how it holds up. Same with the wig. You want to check to see how it fits and how comfortable it is — you may need to get more pins or a different style of wig. You should try to wear it for a full day before the convention.