This secret optimizes the service life of your media (sand material), and also optimizes your sandblasting effect by using the proportion of sand used. Using too much sand won't get any faster work, but your sand will wear out much faster. Using too little will reduce your efficiency, and it is difficult to achieve the effect you want. The amount of sand should be between 50% and 90% of the storage device. Determine your sandblasting time to meet your requirements, too long is a waste. According to the effect you want and the material of your workpiece, choose the suitable sand material to complete the work, and find the right position angle.