I went through a Gallon (whole truck) in about 2 hours once started using a 60 Gallon 11.5 CFM Compressor and 8 Rattle Cans. (Used in the doors, hood, inside fender flares, tailgate etc.) I mixed the FF using a drywall mud mixer on my Milwauke drill after the gallon sit in hot water before opening. It was dripping out on the ground several days later. Check your spray pattern and adjust if needed. I would say if your Compressor is small then you will see a difference in the spray pattern when pressure drops. Equals more pause time. I used the kit from Amazon for Woolwax. I did think about switching to a 3/8" hose but it wasn't seemingly needed and the kit worked well. Just be careful not to kink the long hose.