I did my garage with rustoleum (or whatever homedepot was selling). it was a new construction (foundation poured 6 months prior) in 2005.
use the flakes unless you want to fall on your ass when it's wet.
the coating is holding up OK. wet tires will leave marks. I do absolutely no maintenance on the floor other than sweeping so there are lots of stains. not sure if they are permanent.
2011 KTM RC8R
2012 BMW S1000RR
2000 Kawasaki ZRX1100
2013 KTM SMT 990