Nadda for blue collar markets. That's more of a specialty like showrooms for people with collections. And even then, they're likely to refinish it to match their motif anyway at that point.
You'd be better off putting that money in kitchens and bathroom floors than finishing a garage floor if you are seeking a return of investment. You won't see a dime of that back in a garage. Refinishing a garage or shop floor is a labor of love and a point of pride for the owners. Much like building a one-off custom car, boat or different accessories on a truck; you won't see a monetary return on investment when you decide to go a different direction. In my experience of buying/selling; buyers are not looking at the garage floor. They're looking at the yard, kitchen and bathroom(s) primarily.
If an epoxy floor had conveyed with either our shop or our garage, it would have cost me time and money to get the floor re-textured to a point that I would not have to worry about injury from sliding on loose fluid(s) or dripping rain/ melting snow. Pulling into garages from the ice and snow can be dangerous enough even with modern ABS. If they had installed some sort of tile or decking in my shop, it would have been a deal killer if they were asking more for the listing. It would have been lost on me because I would have had to pull it up so I could cut/weld/grind metal without destroying the decking.
As it was, my house sat on the market for over a year because the owners thought that shop they installed somehow doubled the value. The reality set in and I can assure you they didn't receive more than assessed value, which put them back at square one. They may have gotten 10% more for the place than they would have if they had not built the shop.
They would have gotten what they wanted if they had taken the same money and put it into the house itself. Specifically the dated kitchen and small bathrooms. If in doubt, contact a legitimate assessor in your area before making a large investment for a residence you plan to sell. It would have saved the previous owners at least $45K USD.
I'm not complaining. I love my shop but it wasn't the smartest move on their part to build. Shops and garages are what they are: Utility spaces. Usually a space that is not lived in doesn't bring a lot of value to the property and is not a great return on investment.
One of the hardest things I have to deal with is that the easiest person for me to fool is myself. Like almost every other guy, I can convince myself that the new great idea I have makes financial sense. I tend to start looking at buying equipment up front to try and justify a project. That's how we end up with really cool tools that we use once. Don't touch my tools though....