Think of the extender solution as a clear coat for your airbrush tattoo or body art. When properly applied, the clear coat will wear off leaving the paint to look good for another day.
Apply the extender solution over the painted area, taking care to avoid the unpainted skin. It is best to do this before removing the stencil if using one. After applying the extender solution, lightly dust the area with baby powder to set the solution. When applying the extender solution, make sure you dab it or airbrush it over the inked area. Don't rub it. The extender solution will dissolve the ink when it is wet.