A 100% epoxy solids
grout is difficult to work with. When you complete a 100% solids expoxy job you throw all the tools used away.
A modified epoxy grout is much easier to work with. It spreads very easy and cleans up easier then standard grout.
Spectralock Pro is suggested. There is a quality difference between spectralock pro and spectralock grout. Pro version is a more durable product with a added part.
Lowes sells basic spectralock not pro.
If using spectralock pro grout use softscrub with bleach and part "C" for cleanup of missed areas.
If using standard spectralock use vinegar and water for cleanup.