Questions about Brantho Korrux Nitrofest

Hello together, I want to “winter” a few small places with Brantho Korrux Nitrofest. Unfortunately, I had to find out that the stuff is quite numerous and can thus be badly brushed. It doesn’t go well and becomes rather patchy or blurry when brushing. Is this normal or am I doing something wrong? Of course, the can was stirred and shaken before.