The rust is just on the surface, probably just needs vinegar soak and a heavy scrub, probably don't need power tools. But, the tools would make quick work of it.

I also recommend a vinegar soak, and also would like to point out that you didn't get rid of the protective wax coating it seems. 

Hi. One night, perhaps after having a couple too many drinks, my almost new carbon steel pan into the dishwasher. Obviously this was stupid.

Is it worth cleaning? It has some rust on it, some strange marks along the bottom, and what I assume is a normal amount of tarnish. My plan would be to maybe apply vinegar, and remove the rust with an oscillating tool. I've included some pictures. Thanks for your time!

https://imgur.com/a/wA7jo

Worth cleaning, and tips for doing so?