Don't know if this works for this kind of wax but it does with candle wax, get your tunic on your ironing board, cover wax spot with kitchen roll and then a tea towel and iron over. Keep checking and wax will be removed onto kitchen roll.
I done this once when I knocked a hot candle off the table and it splashed up my jeans!
Not sure if it works with body/warm wax but may be worth a try? X