i just feel it like this white candle i have is really soft like its completly as hard as it will get and i can push my finger into it, and i have a hard candle that is like a rock, but other waxes such as pastels (not even sure if they are wax, but they work) are soft or some brands of crayons are soft
and waxes such as parrafin wax is really hard, i just find mixing them to be the best cause you can fill in the cracks with the soft and then make is smooth with the hard wax
did that help clear things up?