Spread the epoxy-pebble mixture with concrete trowels until it is smooth and level, about 1/4" thick over the whole patio. Use acetone to clean off the trowel and shovel when pebbles start drying and sticking to them.
Apply one section at a time, working from the back corner out so you don’t walk over the portions you’ve finished. Use an edge trowel to create relief cracks in the epoxy where they were in the existing concrete.
Let the patio dry for 24 hours before walking on it and cover if rain is expected. If the epoxy gets wet before it dries completely it can turn white.