New to this forum, and just seeing this now, sorry for being so late to the party, but it sounds like you will be waiting until spring to pull the trigger.
I've installed a two part epoxy product called Muscle Gloss in two shops now, and could not be happier. Not as economical as the Rustoleum product, but much more durable based on reviews I've read. I did my Dad's 2600 sq-ft shop in 2000, and the product is still in good shape today. I did my 1200 sq-ft shop in July 2015, and so far is proving to be just as durable. I used a chemical etch on my Dad's shop and a mechanical unit on my shop, both seemed to work good. Would say like a lot of stuff, preparation is key.
What I like the most about it is (out side of the aesthetics) is fluid spills wipe right up, no need for oil dry, wipe it up with a shop towel and clean with any floor or degreaser product. Draw back would have to be it's a little slippery when wet, and the blue color I chose does show some scuffs. Overall I would highly recommend it.
https://www.musclegloss.com/
Attaching a before and after shop of my place, as well as more current picture. My Dad's place is grey, picture is current 17 years after installation.
Shop Floor Before and After.JPG
Current Floor.JPG
Dads Shop Floor.JPG
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