Nice work.

Densifier would be a good idea.
It soaks in and stops the dust, and you can't tell the floor has been coated/there is no visible coating.
Grinding metal, welding metal, fire, sparks, dropping heavy objects on it has no effect.
It also prevents future fluids from soaking in.

It's typically used before grinding and polishing concrete but can also just be sprayed on and left alone.

https://www.legacyindustrial.net/products/densifiers/hd37-densifier-plus.html

I used the above, started to move in and then won a contest for $500 worth of floor coating for free on garagejournal, so I
had to move back out again to apply the coating. Years later I've damaged the floor coating just as predicted
but both it and the densifier have done their job/no complaints.