May God protect you from the evil eye, first of all, I wish you success in your work. After sanding the moldy metal, you need to paint two coats with cellulosic paint and the first paint dries within 2 hours. If you do the second paint, it will be more protective and have a bright and beautiful appearance. The gas in cellulosic paints is volatile, so it starts to dry immediately. Use gloves as much as possible while painting. Cellulosic thinners and paints are sharp and harmful to the skin compared to other thinners and paints. Cellulosic paint is always good for iron parts and has a long life.
Spray pattern on the gun needs to be adjusted for a wider spray vertically. A rattle can spray bomb has a wider pattern than yours. A little pattern will take hrs to paint rather than minutes. Search RU-vid on how to setup a spray gun.😮 Your pattern is showing stripes.
That particular gun is a touch up gun. If you try to expand the pattern, most of the paint won't be sufficient, and more coat would be needed. This way, she'll use less paint. It's similar to a DeVilbiss.
When painting with the air pump, do not hold it close to the iron parts, because if you do it from a close distance, it will leave a mark on the iron parts.
Eat yoghurt before going to sleep in the evening and sleep like that, you will sleep comfortably until the morning and you will remove the heavy metal dust from your body while you sleep at night.🎉
why don't you get some solderless terminals,that way you don't have to twist wires together,and they are more waterproof. They are so easy to use,if you need tools for striping wires I will send you some.😃😃😃