You will typically find the following information in the "technical specification" table on any given data sheet:
Pot life refers to the amount of time that epoxy resin remains usable after Part A (the paint) has been mixed with Part B (the hardener/activator).
The working time of epoxy resin, however, refers to the amount of time you have to apply and manipulate the resin before it starts to cure.
Provided the suitable preparatory work has been achieved beforehand, it should be more than possible to evenly coat the surface of the entire area you need, before the working time has exceeded and the resin starts to cure.