The majority of professional branded polishes apply well.
Companies have spent fortunes not just on getting the consistency of the polish right but the ergonomics of the bottle and lid.
Cheap OTC polishes can be a nightmare to apply with their stubby brushes and gloopy consistency, and shouldn't really be used in a professional environment.
As your experience grows though you will be able to apply well no matter the brand, because you will adapt to suit, or have the sense to change the brush :wink2: