The weird applicator that comes with Poorboy's products takes a little getting used to. First of all, it MUST be moist to work. It will dry out quickly, but that's not something a little QD can't fix (S&W).
I've used EX-P with a finishing pad on the PC, foam applicators, and the Poorboy's Squish Box. I found thin application of the sealant easiest with the Poorboy's applicator (although with EX, I prefer the PC).
It bears repeating--keep the applicator moist and in the Ziploc in which you received it. They can be machine washed.