I want to paint a design on the side of my garage and have it look faded or like old paint, It is hardy plank with wood like texture. Any thoughts?

How many days can I wait to put second oil coat on wrought iron railing due to weather condition?

The next morning it Chalk up in places.. What would cause this?

I have bought paint samples: I have 3 type of textures & I have used the color on all 3 textures & they all a different color.  One is brick on a fireplace, panel that was a light yellow, the last is on sheet rock lightly textured.  the color is