How to erease all jailbreak trace

Hi, first of all please excuse me for my english.

I have a Kindle Paperwhite PW4 model (serial with G000PP), and i'm about to sell my Kindle. I want to put the device 100% like when i buy it from Amazon (if the buyer want to update or wathever).

Ive search à little bit but i dont find the procedure.

I Just put a recent BIN firnware at the root and update my Kindle?

Sorry again for my english and if this question was already asked before.

Thanks for your help.

-A newbie