This product, like other phosphors, must be kept protected from light! So to be enclosed in a fabric containing, plastic or other materials, a case, a box, a bag OPAQUE AND BLACK !!! And away from the heat and cold ... Finally, we must stir the paint directly from the tube, using a long, thin rod, needle, skewer ... this blender is rotated in the tube, from right to left, top to bottom, from left to right and vice versa, etc, etc ... After thorough mixing, the paint will be thick, sticky and very opaque. We can superimpose the layers using a brush or directly with the tube: do not forget to let dry between coats! It does so with all the tubes or paint cans of any type whatsoever ... After use, close the tube by driving the residual air and verifying that the paint is flush with the end of the opening.