This is a 1 ounce bottle of Microscale Industries Micro Mask Liquid Masking. Micro Mask is like masking tape in a bottle. Just apply it with a brush, let it dry, and cut it to any shape you want with a sharp-pointed knife. Peel out the part where you want to paint, leaving an outer stencil mask, and paint with the method you prefer. However, do not use water-based paints with Micro Mask, because it is water-soluble. Note, more than one coat may be necessary to build up some depth in thickness making it more easily removed. Irregular surfaces, odd shapes, any detail that you can cut with a knife – Micro Mask is your choice for all these difficult masking challenges! There is also the added bonus of paint not creeping under Micro Mask, unlike regular masking tape. To remove Micro Mask after the paint has dried, simply rub a piece of masking tape onto the Micro Mask, and then pull it quickly away. In difficult areas, applying water to the Micro Mask will soften it, and then it can be removed with an old toothbrush.