I was being trained by an old painter many many years ago We were stiring paint I was going round and round. He joking said don't do that you need to go back and forth. I said what differance would that make - he told me when he was young he worked for a man who used to scream at him if he did not stir side to side. He felt it made a differance. Thank God for paint shakers the machine does it far better than my side to side or round and round.
Sam DiBartolomeo
Riverside CA