I can't say enough about the Richesion brush for coating palladium and kallitype. They don't absorb the chemicals so the mount of chemisry used is about the same as with a coating rod, and coating rods are just dastardly things in my opinion. Smooth as silk and don't shed.
Get as many as you can afford. The 1" and 1.5" brush are great for small prints of 4X5 and 5X7, the 1.5" and 2" are good for 8X10 and 11X14, and the 4" versin is super for 7X17, 12X20 and even 20X24.
Well, I can say one bad thing about the Richesion. The paint sucks and starts to crack almost as soon as you use it.