Natty's Blue and regular Natty's can be a bit difficult to work with as they tend to clump up as the picture shows. It is very important that you work the product in the jar so their are no chunks on your applicator pad. One of the reasons I really like the P21s Concours is that I've yet to have that problem. Once you get the hang of breaking down the paste wax it works very easily. What I try to do is create a cup like effect, start using the product in the middle, then work to the outsides, it tends to stay together better that way.
Maybe others can chime in with their tips on paste waxes.
George @ DI