Finely grate the beeswax and weigh the grated bits to 2 ounces.
In a double boiler, melt the beeswax, cocoa butter, and coconut oil until liquid. Remove from heat.
Slowing whisk in the zinc, stirring until all lumps are gone. When this mixture is slightly cooled, stir in the liquid oil until well combined.
Use a butter knife to scoop the sunscreen into the squeeze bottles. Or store in a glass jar with a lid.