I've not seen that locally so interested in seeing how you go.
Like any paint it does take some time to work out how heavy or light you can spray as well as distance from the piece.
As I've said previously I found auto acrylic really the easiest of all the paints I've tried, very forgiving but sure you can still get runs. I've painted 3 sets of armor and 1/2 dozen helmets without much issues. I would suggest cleaning the spray tip between spraying as well as shaking the cans, no matter how long you have shaken it before you begin.
One paint I did try with my Mandalorian was the 2K clear, love this stuff, expensive and highly toxic and you need to use the whole spray can once activated but what a finish, gives a deep look and very glossy, it also has very little orange peel due to how it dries.
Hope you have better luck this time