This are a very liquid alcohol paints, and MUST be shaked well before and during use. It is convenient to use a thin stick to revolve the paint is in use, because it has real metal in the composition and the components separate easily inside the jar.

These are realtively easy to use, they don't spread to the surrounding areas, but you must be quick, the paint are really thin. Do not worry about coverage. You do not need several coats. I use 1 on white plastic and was enough. Maybe over dark colors it could be necesary 2 coats.