Once your candle has completely cooled, you will notice that the wax has sunken a bit in the middle.
With the wax that you saved from the previous step, melt it back down and bring it to a temperature of 185 degrees F. We use a higher temperature for the second pour because it increases the adhesion between layers of wax.

Re-pour to a level that just barely covers the wax from the initial pour. Going to this level helps hide any seam lines.

Allow your candle to completely cool.