Removing carpet strips from interior concrete
I'm in a condo with a concrete floor downstairs. Until I put in kitchen cabinets, I don't want to finish the floor, but the carpet has GOT to go now. Since I'm not sure if I want a full tile floor, I decided to live with the concrete for a bit and see what a hard floor will be like (temperature, comfort, etc.). Carpet came up easily enough, but the strips along the walls are an issue.
First of 2 issues: The wood is almost rotted through and comes off easily, but there are rusted nails/tacks into the concrete that are stuck. Prying them up with a crowbar is pulling up chunks of concrete as well. As I may decide to just finish the concrete instead of tiling, I'm concerned about filling these in with something that looks different from the surrounding concrete.
I have read through many posts, and other than a mention that my problem is normal, I haven't found much.
Is there any way to deal with these nails without damaging the concrete? If not, what should I fill in the holes with?
Second issue: I was told that a concrete sealant will have to be removed before eventual tiling. Is there a less penetrating, more temporary option I can use for a year or so? I understand that water-based acrylic may do the trick, but wanted to confirm.
Background: The slab was poured about 30 years ago, and yes, there has been a flood or two from leaks over the years...
Thanks in advance!