painting equipments

Painting my ute, first time spray painter, any tips?
im thinking about painting the tray on my ute
ive got all the equipment, cept the paint
im going to hoist the tray off the ute using an endless chain
what should i look out for ?
what should i be aware of when regarding primer, or anti rust products?
im painting it white
so yea some tips would be good, thanks, tips about anything and everything
thankyou
Would use two pack primer as it can be covered by any type of paint.