First of all how far along are you on the Prep work?

If you have all the body work done & have it primed & blocked several times to make it as straight as possiable then heres what you do:

I would use Base coat /Clear Coat as its very forgiving.
If you run the base you can stop , let dry for a few minutes , sand with 800- 1000 grit paper wet & dry it off , tack it & keep on spraying.
( I am a PPG, ASE, GM Auto Paint refinisher of 27 years)
So naturally I would have to steer you towards PPG's Deltron DBU Base & Clear system.
Dupont & Sikkens are fine products too , but I have never much cared for them.

I see you are going to use silver as your main color, It is possiably one of the harder colors to spray( next to Kandys & pearls) as its all mica & metallics, & very little pigment & will tiger stripe very easy if you dont cross hatch while appling the base.
(Cross hatching is where you go length wize , then next coat go across it a different direction, like a checker board fashion).

Your prep work better be very good as any little scratch will show up in the Silver !

ok now thats out of the way & your truck is masked off.
# 1: wipe vehicle down with wax & grease remover
#2: Tack it off with a tack cloth( a piece of cheese cloth coated with bees wax) to get all the fine pieces of lint & dirt off truck panels.
#3: spray a required sealer down.
#4: Mix color & load gun.
#5: spray color. ( now if you are wanting stripes you will let the silver base dry for a few hours ( depending on shop temp)
lay out your stripes with a vynal tape, mask off everything you dont want purple.
#6: scuff taped off stripes with a white or gray scotch brite pad lightly.(for extra adhesion.)
#7: spray purple & let dry for awhile.
#8: unwrap stripes .
#9: Re-tack vehicle.
#10: Mix up Clear & spray, 2 coats are reccomended if you are not going to color sand and buff to a high gloss.- 3-4 coats of clear if your wanting to cut( color sand) & buff.
#11: If you are going to paint in your garage make sure you have alot of ventalation & a good respirator !!
I would also reccomend a good HVLP spray Gun.

leave a fan running over night on slow with a window cracked to let all evaporating solvents gas off, as if you dont the clear has a tendancy to fall flat. This is called Die-Back. No matter what paint product you use.
Well I hope I havent frightened you off to much......

SprayTech