Magnesium is very reactive with water, never bind magnesium stars using water. Binding with acetone disolves the parlon, which acts as both the binder and protects the magnesium from corrosion. Work with acetone outdoors, in the shade and during low humidity conditions in order to reduce condensation caused by the rapidly evaporating acetone. Dry these stars outdoors in the shade.
Adding 5% red gum allows this star to be bound by alcohol (95% pure required), but this will sacrifice the corrosion protection provided when using acetone as the binder. Alcohol bound mag stars can not have nitrate containing compositions layered over them. Prime with a hot prime, such as BP with metal added or a 1:1 mixture of the mag comp and meal, with a final prime of straight meal.