I am a landscaper and do lots of hardscaoe work.
Techniseal is someof the best products, alliance is also good.
There range from invisie to wet look I assume you want the wet look that enhances the color more...
It wouldn’t take that long..
The diamond cup wheels are really fast.
also if you rent a floor grinder make sure you have help or equipment to move it. They are heavy
Rental stores may have them but not around here. They are pretty pricy to buy for a one time use. A respirator mask and a couple of replaceable filters are $30.00.
the floor grinders blades mine slow and scrape with carbide teeth and don’t make the small dust particle like a cup wheel grinder...
So the person that recommended renting a floor grinder is spot on. I have done this type of job many times for customers.
The conCrete floor grinders will make it nice and flat. Also if you use a hand vrinder get a Diamond cup wheel on a 71/2 or 8 inch grinder.
It will do a good job and will...