There are probably lots of ways to do this, but this is my favorite method. It's doesn't take too long, and can get great results!
Check out my video on how to sharpen a serrated blade here:
   • The SECRET to sharpening a SERRATED B...  
and my playlist on the best budget sharpeners:
   • Best BUDGET knife sharpers  

Here are the tools I used in this video:
Black and Decker Rotary Tool:
https://amzn.to/3cyLcTn

Dremel flex shaft kit:
https://amzn.to/3atz1FJ

Engraving bits:
https://amzn.to/38n3F1X

Diamond pen sharpener:
https://amzn.to/2S4uDGh

*Prices mentioned in this video are subject to change without notice, please check the links below for current pricing.

Full disclosure: I am an Amazon Associate, and the links in this description are affiliate links, which means that if you make a purchase, it doesn't cost you any more money, but I will earn a commission.

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Background music made by Jordan Rowan of iMakeMusic
Audiojungle: https://audiojungle.net/user/imakemusic