DO NOT let Renaissance Wax dry for ANY length of time or even more than a few seconds before buffing. This is the recommendation by the manufacturer and eludes to that on the can itself stating it dries and becomes hard instantly.
Renaissance Wax bonds and builds up on porous surfaces so you definitely do not want to let it sit for more than a few seconds before you buff it off.. Just use "long strokes and thin coats"
...You can repeat the process if you desire but leaving it sit on surfaces to "cake" is not recommended at all.