How Many Flakes to Order
Generally speaking 1# of flakes per 100 Sq. Ft. is a beautiful, random broadcast application. Typically, going heavier and not going full broadcast simply does not look right. So simply take the square footage of your garage and divide by 100. You will need to round up and order in increments of 5 pounds.
How to Install a Random Broadcast Floor
First prepare your floor in accordance with the coatings manufacturers instructions and install any recommended primer. Floors should be free of oil, dust, and other contaminants. For epoxy floors and most coatings, the floor should be adequately profiled using an acceptable grinding or shot blasting method. If applicable install the suggested primer. With Rust Bullet you would install the first coat of gray. If you are doing more than two coats, you would start the next step in your final gray coat. For epoxy we assume you are only doing one coat.
The next step is generally easier when you have a second person helping you. As you roll on a section, the second person will toss a handful of flakes UP NOT DOWN. By tossing the flake up, you get a more even distribution. Do not overthink this and do not try and get everything perfectly even. The beauty of a random broadcast floor, is like the beauty of real wood. It is not the same everyplace you look.
Allow the floor to dry. Then take a good wet dry vacuum with a floor attachment (cover the edges in duct tape to prevent black marks) and run it over the entire floor using light to moderate pressure. Knock down any flakes standing on edge and remove any that did not adhere. Apply your clear coat and desired amount of antiskid.