Quick update on this! I melted the wax first at 210C. Note the high temperature was necessary melt the wax and keep molten. I added the 'salt' which also melted. However, since the molten salt is denser than molten wax, the salt settled at the bottom. Mixing with a glass rod could not provide good homogeneity.
I decided to make another go at it this time adding the salt dissolved in water to the molten wax. Each drop added popped off spluttering the wax out. This looked so dangerous.
My guess is that my chosen vegetable wax maybe a bad fit because of the high temperature required to melt. Should I try paraffin wax instead? Any