We've done another with grinding and just seal with an epoxy border.So far, they have been instant rentals.Next we will try the polished concrete. 

There's real creative and well polished work.

It's more about the fact that he came from a time and place (old school Polish) where business was done with a handshake and his trust in people has gotten him into situations where he's lost enormous amounts of money.

I even saw one house with a polished wood floor that had dark spots.

I'm happy to organize and e.g. advertise it on meetup.com.Btw, there is an existing regular Real Estate meetup group in Dublin https://www.meetup.com/Polish-Landlords-Association-Dublin/However it's mostly targeted at Polish investors.

It it's just a spit and polish after the last tenants moved out.

I am still thinking if for the rest of the home, just polish the rest of the floors, because it be cheaper.

Use nail polish remover.

Indeed, when the US bank will not take into account the revenue from the Polish property to repay the loan.

Today it is difficult to make money unless you are buying properties that need a bit of polish.