I like to thin by 30%. If you have an in-line pressure regulator, use that to set your operating psi, and open the air valve on the gun all the way. Play with your fan width and amount of material controls to get even coverage at a distance that works with your most consistent spraying distance. If you move the gun in and away too much, you'll end up with uneven coverage. Several super light passes for one coat has worked well for me. Don't worry about spots that are a little light on your first couple coats, as they are much easier to lightly sand, or will blend/cover with additional coats! Runs are much harder to deal with than a small light spot! Never try to cover a flaw in the finish without sanding it out (runs or orange peel) as it will always show in top coats without a lot of extra finish work. Try not to spray in high heat or humidity as this will cause the atomized spray to start drying before it can lay down flat, sometimes causing orange peel or a surface that feels or looks like it is frosty or dusty. These are a few of the tips that have worked for me spraying Thunderbird finishes. I've heard that Buffalo Hide is the same product with a different label.