If I was going to recreate the plaid, I'd go with sewing. Paint can be difficult to control [Depending on the line thickness], and doesn't have the same look or feel as something sewn on.
Next con: Katsucon
What I am working on:
(New)Utena Tenjou - Revolutionary Girl Utena
(Remaking) Sakuya Izayoi - Touhou Project
Akko Kagari - Little Witch Academia
Wicked Lady - Sailor Moon
Merlin - BBC Merlin