I purchased Rust-Oleum Garage coat 2-part Tan Glos...

I purchased Rust-Oleum Garage coat 2-part Tan Gloss Garage Floor Polycuramine Kit at Lowe's. I have a standard 2-car garage. I purchased a kit and was hoping that it would be sufficient for my garage. I did only one quote and the paint was over after only half the garage was covered (see picture 1 attached). I'd no other option but run to my local Lowe's store and spend another $199 for the second kit. This is NOT for 2.5 car garage. Also, the decorative chips discovered my floor (see picture 2).