Wow! How do get that great hammered finish? Mine tend to get much less pronounced.
It's like the old joke -
"How do you get to Carnegie Hall?"
"Practice"
Lay down a 50% coat. Shoot from both sides and ends.
Repeat once to build to a light 90-100% coverage. Let sit for a minute or two.
Lay down a heavy coat, again being careful to spray from each side and each end with even strokes that start off one end of the panel and finish past the other end. You want to spray along the length and also along the width to get an even pattern. Be sure to spray well off the edge of the panel to get good coverage at the edges.
Don't spray over it once it has set for more than a minute. That can ruin the pattern.
Don't touch the panel for a couple of days, and don't mount hardware for a week or so.