Some paint questions for the guys who know paint

yah i just ran into this today.
my 69 dart im painting this week and i bought paint at a local store been around for years.
im doing a candy red but without candy so i went with the new ford mustang candy red so its just a metalic but same shade and everything without the hassle of candys. red is very expensive and you need good coverage and a solid primer coat with no different shades.
The paint i got was a bout $600 with everything i needed including a little bondo,tach cloths and some surface prep cleaner. it was same quality as ppg. i got a gallon paint and gallon base and gallon clear.
Im not painting the hood though so I think ill be ok.
If you just dont do too heavy in one area then you shouldnt use too too much paint like do one good coat all around and like under the hood i would leave for the second coat last so you know you have enough for a second coat on the body.... and so on. I think most paint stores are pretty good like mine were you can tell them a car and what exactly your going to spray and they get close to how much you need.
and with mine i had to get activators and catalycers too so i only have 4 hours to spray after i mix so i can just mix up all at once and hope i spray through it all before it goes bad.