We have refinished our first floor 7 years ago and probably in another 2-3 we will need to buff and apply a coat of poly to it.

You can do amazing things with a good tile saw and a set of diamond buffs for a drill.

I have a friend who wanted to rent from me and I had to gently say no.

But I know they're only asking in such an overly gentle manner because they've had stuck up brats before (and seen plenty on social media) whining about how if they stayed at a Hilton they wouldn't have to "pay a cleaning fee and then clean the property myself", where apparently spending 10 seconds wheeling a trashcan 20 feet is "cleaning the whole property" themselves.Again, I'm just glad I have mostly larger (and some rural) properties where those kind of guests aren't frequent. 

At the same time, I will send comps from the neighborhood in the last year showing lower sale prices per square foot, and gently suggest that they have misunderstood the market at the neighborhood level.2.

Be gentle, I'm learning.

@William Byrd, I am an aviation buff myself, I have had my private pilots license since 2001.  

Now, dip the sponge in vinegar or ammonia and scrub gently in a circular motion. wash the walls and dry them with chamois cloth.

I was quoted about a $1 per sf to buff and re-coat. 

Looking for service/contractor to strip and wax and buff commercial vinyl tile flooring in 6 Unit apt building.