YEP! I did this not too long ago with an old drawing of Morrigan, and seeing the difference in quality really helped put into perspective just how much I actually improved.
Some of my favourite pieces I've made with Copic markers. If you've wanna give Copics a try, recently opened their US stores online. Just use my code ASCHMIT10 to get 10% off your order. Thanks so much for the sponsor from Copic!