I use PB in my tarts and have just started adding 10% 464 ,ive found it has a great throw alone or mixed with other wax enough to scent a two story home on both levels with one small melt.
I have salt and pepper shakers and put the colours in them i just bought a large rotatable rack with spice jars 15 jars i think ,so i can store more that way. I usually ended up with glitter all over the place trying other methods.