I’ve also used the rustoleum with great results. I’ve used it in three different garages with good results in all. If you use chips, throw them as high as you can and they will disperse as they fall and give pretty good even coverage. My thought has always been that if it starts to flake I could buy an additional kit for touch ups under $100, but I’ve never needed to. I drag a floor jack across mine all the time.

No surprise, your results will be based on the quality of the prep.