Hi, i soon will be painting my own fairings ZX6R 1999.
I think i will use 1 liter to start with add hardner and thinner and will be more then a liter how much gallon that is i do not know im from the netherlands
we use the metric system as explained in pulp Fiction
If you need more you can always buy more later.
I spray with a gravity gun at about 2 or 3 bar how much psi that is i do not know but im sure you compressor can handle it.