I may be getting the hang of this color painting. This is my second coat. I didn't use a guide coat. On the first color coat I found a few spots to work on. I then shot those spots with 2k hi build and block sanded them.
I could have used a contrasting color of 2k for guide coat as I have both buff and black but it didn't occur to me until after the first color coat! Live and learn.
I had my best luck with orange peel shooting only one coat and waiting until the next day for the 2nd coat. I had good luck with the single stage PPG Concepts using the 4:2:1 ratio of paint/thinner/activator.
My Kirker black paint didn't specify how much thinner (rather a viscosity I couldn't measure) but it worked great with the same 4:2:1 ratio.
My Restoration Shop paint Rock Moss Green specified 4:1:1 but I used the same 4:2:1 and it shot good as well.
It's probably obvious to an experienced painter but I didn't realize that enough thinner is what helps eliminate the orange peel. And I quit trying to use up the leftover paint in the gun by fogging on a quick second coat.
I sure like my new Owata LPH 440 gun for easy spraying with little to no overspray. It is a very low pressure gun at 16psi. I'm using a Sears 220v no-oil compressor with two pistons and about a 40 gallon horizontal tank that puts out about 14cfm that a friend gave me. The no-oil compressor is also good in that I don't get any oil to the gun or my breathing air mask. It keeps up just fine with the Owata at 10cfm and my Pur Air 2000 breathing system. I use one hose from the compressor to my belt and then a short hose to the gun and another short one to the mask.I can't use my Pur Air 2000 with my SATA NR2000 as it uses 15cfm or my SATA KH primer gun. I hung up the NR2000 and use an organic vapor respirator for the KH.
I bought the Owata gun new when I realized my compressor wouldn't keep up with the NR2000 and Pur Air 2000 at the same time. I noodled around various forums and found lots of good press on the Owata gun. Cost about $450 on ebay.
On to a second coat for the tailgate, driver's door, and one hood section for my 28 RPU Rock Moss Green.