Chaos Black comes in the spray can, but you can easily decant it, as you do with other caned products.
Instead you can use Mr. Surfacer for such purpose, but i find Chaos Black so easy, and troublefree aplication allows for perfect coat every time.
I use airbrush for some figure painting- f.e. the clothing. I spray base coat, and then using the paintbrush to apply the shadows, and highlights.
I spray the base skin tone to head, and hands also.