All cans say right on the side. It might be 4-1-1, But it will list it like that on the can of paint. If you have never sprayed it mix a cup/gun worth at a time, Depending on your weather and humidity that day might have to add here or there. Just regular enamel paint, But prepared to wear half of it unless spraying outside.
I have better luck adding a little more hardener in the mixture but thats the way i like it, And i put the first coat on real heavy to where it will almost run. But to avoid cracks, Well at least right away, Dont let the sun hit it for 36 to 48 hours. It will have different and more flash times than base/clear. Only my opinion, Take extra time in prep and you will more than likely have a better paint job. Good luck