Next step I take my paint stripper heat gun on LOW setting, while holding horn upside down, I begin melting wax a small section of a time letting it pool up and run down the horns in waves. Keep moving the heat gun down without stopping too long any any one place. The wax will melt then begin to set up on section you already moved from.
It usually takes 3-4 rounds on the melting to get wax absorbed into the horn and cracks. Don’t melt it so much it completely runs off horn. Here is pic of about where I want it before I start the rubbing process.