spraying base and clear?

killer454 · 10-15-2009, 10:00 AM

trying to learn how to spray nason base and nason clear coat.

i have been geting a bunch of orange peel in everything i have painted so far.(drivers door,front clip)

i think i know why im getting all this orange peel,i have been spraying with 10 psi at my gun.

i just watched a video on utube and it tells you to spray at 27-30 psi for base and clear,does this sound right.

i read the tech sheet on the paint and it gave me 8-10 psi so this is what i have been spraying at but this cant be right.

can anybody give me advice and information on my post please.
thanks for the help

porchdog · 10-15-2009, 10:07 AM

orange peel = fluid control
sags = air pressure.

if using a cheap gun you are sol .you are going for a thin slick coat. do not try to flood it on so it will flow. urethane does not flow. it must be shot for effect. meaning it must look the way you want when shot. think drops. small drops lay smooth, big drops cause peel, thick coats cause thanepeel.

100 lbs at wall, 22-25 at gun (iwata).
cheap gun - 100 lbs at wall , 30 to 35 at gun, fan 3/4 wide open, 2.5 turns out on fluid. adjust from there.

10 psi is at the tip, not the gun. takes 22-25 in my iwata to get 10 at the tip.

killer454 · 10-15-2009, 05:27 PM

thanks for the information porchdog this is where i have been messingup on this paint.
i bought a 40.00 gun from harbor freight but after spraying the front clip i got it sitting on a shelf now went to napa and bought a 150.00 gun now and it works a lot better.
i will put the regulator at the wall were my filter trap is at 100 psi and take my regulator at the gun up to 30 psi.

i want the paint to go on this car and look very good without color sanding the whole car down.im in the process of sanding the orange peel out of the front clip can i just respray clear on the front clip to get it to match the rest of the car?i think this psi issue will take care of the orange peel issue im running into.

i also saw that some people let the base dry for a couple of hours before spraying the clear. i have been spraying the clear on after 30 min.can i wait longer on this?or should i

porchdog · 10-15-2009, 05:46 PM

flash time is your friend . i would just hit the clear with 600 then reclear. i do 3 coats of clear the wait over night then 3 more coats after sanding with 600. every coat you do traps trash and builds peel. by sanding then reclearing you only have 2 or 3 coats to deal with.