Bricks, Masonry, Asphalt and Concrete - concrete stain preparation

I'm trying to change the floor of a room from carpet to stained concrete in a house with a concrete foundation. I have pulled the carpet and the tackboards. I now have a concrete floor that needs clean-up and minor repair (no cracks!).

On the floor are three materials I need to clean off: drywall mud, wall paint, and carpet adhesive. Eze-up Flooring Adhesive remover was recomended to me for removing the carpet adhesive. Do I just need to scrape up the paint and mud or is there a faster method (there is a lot of it)?

Pulling the tackboards have left holes near the walls. How do I repair the holes left from the tackboard nails? Specifically, what patch material should I use that will take a stain and have good adhesion to the floor? How long will it need to cure?

Given that the patch material usually will not match the color of the concrete floor, would using a product like Skimstone be a better choice than acid stain in this application?

Thanks in advance for any advice!

In each of the areas with other materials, the absorption of the concrete will be different. Expect variations in the color even if the floor is clean.

Dick

I have a solution for dealing with the color varations. I am using multiple colors on the floor (at least 2, maybe three) so there is planned color varation.

If all the concrete takes stain well except where the repairs for tack strip are you can paint/stain a border around the room. Drywall mud comes up well with water, paint can be quite stubborn - may require use of solvents or stripper.