painting mouldings

ok im gonna paint them (going by instruction in TegTips)

ok im in high school, so im gonna start @ around 4 pm and i have till the next morning to let it dry. ill brake it into sections for different days.

will it be ok to leave the car outside (hot afternoon weather, cool moist morning conditions)???

does this sound good to painting gurus?

any pointers, things i need to watch out for before i start.