Collinite Wax

As its a nuba, it should be applied to a panel or two, left to haze and removed.

 

That is exactly how I do it. Works great every time.
Also, if you are using 845 and it is still very hard, you can heat up a pot of water, and dip the bottle of 845 in the water for a few seconds until it softens, and then shake the hell out of it.
Also, replace the cap that comes with the 845 with a pop up cap. Makes things much easier.