I'm making a Hanabi set out of laser cut MDF. When you laser MDF it has a burnt cut edge.

This can be sanded off, however the tiles are supposed to be indistinguishable from one side, and I'm concerned I'll introduce variation in the piece whilst sanding.

I'm wondering if I can just leave it there (it looks pretty nice!). I can also sand it lightly to get rid of loose burnt particles. In the long run will it slowly rub off, or is it fine as is? Also, if I decide to varnish or otherwise finish these tiles, will these edges cause problems?

[![enter image description here](https://i.stack.imgur.com/74s1Q.jpg)](https://i.stack.imgur.com/74s1Q.jpg)