| We have an epoxy-and-stone finish on the floor of our detailing garage. Not quite the same thing you're discussing but it sounds pretty similar with regard to the topper.
Sand is mixed in with the topper (same as with your current epoxy) and it works fairly well on ours- not really all that different from what you have now as best I can figure. The initial bite is lessened with wear and you do have to be a little careful when the worn areas are wet, but it's not bad at all in my experience (five years so far). It *will* be a little slicker than what you have now. It cleans up pretty well, much better than it would without the topper. I usually just toss the buckets of wash solution/rinse water on the floor and use a push broom to sweep it into the floor drain. This keeps the floor quite clean between "proper" cleanings.
I don't know how you'd top it with the urethane yourself, but if you could find the right product it shouldn't be all that hard. I watched them put it on ours and a) it didn't look like a high-skill job and b) you'd almost certainly do a better job than the guys who did mine. IMO the tricky part would be getting the floor clean enough for it to stick well. |