To make black heads, simply place a toothpick in black makeup and dot one time the toothpick over a skin pore. To give the blackhead a raised effect, you may wish to surround it with a very thin circle touching the black.
To make pimples, using an eyedropper, drop one dot of liquid latex on a glass plate. You may wish to make a few together since pimples are usually together, and small. If you prefer, add some red to the pimple or paint only the pimples a pinkish color. You could be more gross and make them match other colors pimples may have.
To make zits, make a small ball the shape of a zit with clay or play dough the same way you did with making warts. Pour liquid latex over this - all on a glass plate - and let sit overnight. Peel the latex from the clay or play dough, and paint the ball white (but light to match that of a zit), and paint around the base of the ball just before the flat surface with a pink color.
Freckles may be made by simply dotting medium brown dots, lightly, with a Q-tip on the desired area, together as much as possible without blending in with the other dots as much as possible.