Not obvious to me what the best choice might be

Submitted to Product Chat

Hello. What is the best way to address the inside rim of a NEW metal paint cans? 
Years ago I saw a neighbor punched holes with a nail into the can so whatever paint collected it would gravity drip back into the can. I’ve never  participated in this practice.

In particular my acrylic Varathane can get all gummed up it’s often hard to clear out the dried debris in the channel and seal the can securely.

What is Rustoleums recommendation to best practice to maintain the metal  can seal integrity and keep those metal edge of free of gumming up.