Two common situations, both cured the same way....

If you ever put on too much paint, and see some buildup that you don't want

OR

You have just finished a great project, and want to cure your acryllic paints faster....

Simply remove and clean your Airbrush, then use straight air to focus a solid stream of nice dry air to blow away excess paint (get close) or to dry your paint work (move farther away!)

thanks for the tip but i think method one is most suitable for enamels paints..acrylic dry too fast!