NONONONONO
The BEST brush to use is Sable Hair.. You want to be keen that you get REAL Sable, most manufacturers pass off generic weasel hair as Sable..
The hair must have the proper Flexural Strength to apply the right thickness of lube rapidly with a single stroke. Increasing Lube application efficiency and Repeatably.
Too much lube, the key will stick, too little lube, it will require frequent reapplication