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The laser dose not heat the blade to affect the temper. you can pick it up and touch it the second that it is finished. yes the possibilities are end less.

To answer your question, the etching is very durable. It will with stand cleaning and light buffing. It is suspose to with stand most house hold chemicals.I have not tried to clean, rub,or sand it...

This was an old rusty blade.This is my first attempt at laser etching a straight razor. My next project is making a pair of laser engraved scales to go with this blade. When they are done I will post...