Painting help: Omni AU paint

Hey guys I finally got my car all sanded and straightened out and have picked up my painting supplies. However I have never used this type of paint before and have a few questions regarding it.

Here is what I bought and the specs from each can:

~ Omni AU MBC Basecoat
1 MBC : 1 MR series reducers
2-3 cts
20 min (24 hours max)
OB10

~ Omni Medium Reducer
MR186

~ Omni AU High solids Urethane clear
MC161
2 MC161 : 1 MH167/MH168/MH169
2-3 cts.
12 hours @70F / 30 min @ 140F
OB2

~ Omni AU Fast Topcoat Hardener
MH167

~ Omni 1K Primer Surfacer
MP181
1MP181 : 1 MR
1MP181 : 1 MS250
2-4 cts.
OB7

~ Omni Compliant Solvent
MS250

Anyway the paint I usually use is premixed and this is my first time having to mix and reduce and add hardener etc. So what I am hoping for is someone who is familiar with this stuff kind of give me a quick run down of the steps I will have to go through here using these materials, and what goes with what. Am I supposed to mix the primer with reducer and solvent, And basecoat with just reducer, and the hardener is for the clear?

Also as far as surface preparation for this paint, right now the whole car is sanded down to basecoat and or factory primer with 340 grit. should I sand smoother? coarser?

Should I sand between coats of primer? what about basecoat? should I not sand the last layer of primer and not sand the last layer of basecoat?

Whew... long thread. sorry about all the questions I've been reading tons on it and searching but everyone seems to say different things and I was kinda hoping for an opinion on this type of paint specifically. Oh by the way I have painted before just not with this type of stuff. I used to get my paint from some website however it turned out to be way to expensive for the quantity I ordered for this project so I went to a local store to get it.

Anyway thanks alot guys I'm really glad i'm finally getting this stuff wrapped up, i've been doing body work on it all summer in my spare time.

alright well I guess nobody knows. I would have taken even general tips not pertaining to the exact paint type. Anyway maybe someone could just clear up my questions on sanding the primer and basecoat and the question about using reducer and solvent in the primer?

I actually have a question to pose myself and was hoping we could trade answers. I ran out of the basecoat and still need to paint my spoiler but cant seem to find the paint online. If you know of anywhere that will ship a quart of paint I would be forever in your debt. For specifications, the paint i used was mbc 35542 grey Omni AU basecoat.

Anyways, hate to say it but its nice to see someone else with the same struggles. I painted my car last week with the omni base coat with excellent results. luckily i had a highly experienced painter to give me the "low-down" on all the steps:

first off, 340 grit for the initial sanding is good... but make a real effort to keep it completely even; especially along the edges. (all the way around the edge). after you've primed it, i would recommend getting an indicator spray (forget what it's called exactly). Its just a spray can of black paint that you use to very lightly 'mist' the primed area so you know where you've sanded and when you're done sanding the primer.

You don't need to sand between primer coats, but after the last primer coat has dried and you've applied the indicator, hand sand the entire area with 500 grit. careful around any edges, thats where you might go through the primer. After you've sanded the indicator off the primer, continue hand sanding with 500 around the rest of the car. (VERY USEFUL TIP: use a compressor gun to very frequently air off the sandpaper and working area)

clean the car with soap and water or equivalent.
relax, the sanding is over... ish...
there's no sanding between any clear/basecoats. each type of basecoat/clearcoat has different ratios and mixing instructions. refer to any paperwork that came with the paint.
clean the spray gun with reducer/laquer thinner between the last basecoat and first clearcoat.

after the clearcoat has dried fully (usually somewhere around 2 hours after) IF you are hardcore into the perfect paint job, you can actually hand sand the whole car down again with 2000grit up to 2500 and finishing with a polish. make sure you have a lot of coats of clear if you're going to do this. I skipped this massive step and can still see a perfect reflection in mine...

if you're curious about drips and runs like i was, be curious no more. Drips in base coat are tough to get (rookie mistake is to lay them on too thinly). clear coat runs can be fixed with the sanding and polishing routine stated above. make sure to spray PAST the sprayable area to avoid runs alltogether.

to help you clarify a few things
Base coat is mixed 1 to 1 with reducer
clearcoat is mixed 2 to1 to1 with hardener and reducer, you can however add more reducer should you please i usually go 2 clear 1 hardener and 1.5 reducer.
I have never used omni's primer surfacers but it is most likely mixed like all the other i have used which is 1 to 1 with reducer as well.
Hope this helps you out.
Also 2 coats of base is usaully good enough but it depends on the coverage and never do less then 2 coats of clear. If you plan on color sanding and buffing you should go at least 4 coats, i do 5.
for my final sand before paint i use 400 i find anything less leaves sanding marks you can see in the base after it is clearcoated.