Remove the sizing with hot, soapy water and you'll leave the surface ready to be lightly sanded then painted.When it's done wrong it bonds directly to the surface underneath and you're going to destroy that surface trying to remove it.On my first major fix-up, I totaled three walls trying to remove wallpaper and spent over two months removing borders in multiple rooms.

On the surface of it, it looks like you may indeed have fallen into some "Tax Traps" that would do well for other high-income Investors to watch out for.

It could be a great property at the right price but there are a lot of things that look good on the surface that might not be so as you get into finishing.

I've heard a lot about Jacksonville, but have barely scratched the surface on my research into it.  

It looks like a good deal on the surface.

We need to find an affordable fix. re-surface kit from homedepot?  

So you are looking at extensively cleaning and resealing ALL your surfaces in the place, maybe even replacing some areas of subfloor if it is that deep and bad enough.

The good news is with the launch of the new Surface 4, Surface Book, and new Lumia's I think Microsoft has some real winners and will catch the attention of more developers soon.

Here I would not pass my lead test if I had painted floors as they are an impact/friction surface. 

@Allen Collier while on the surface this all makes sense, the question you should ask is why she isn't doing a reverse mortgage.