PSA: My cabinet doors warped because I trusted the big box plywood, and fixing it cost me $680
Everyone in my local woodworking group keeps saying you can get away with the cheap 3/4 ply from the big box store for paint grade doors, and I fully bought into that for a kitchen job in Fresno last month. I built 8 shaker doors with it, sprayed them, and hung them in a garage that hit 95 degrees during the day. Within 6 days, 5 of those doors had twisted so bad you could slide a credit card under the corner when they were closed. I called the supplier and they basically shrugged, so I ate the cost of 3 new sheets of real cabinet grade ply plus my own labor, about $680 out of pocket. The lesson is not that cheap ply is always bad, it is that I was too lazy to acclimate the sheets in the shop for a week before cutting. Now I stack and sticker everything for at least 5 days no matter what the client's timeline looks like. What do you all do for acclimation when the job is on a tight schedule?
I used to stack sheets in the corner and cut them same day, figured wood is wood and the paint hides everything anyway. Then a set of doors I built in July did the exact same thing, twisted within a week, and I had to rebuild all of them on my own dime. Now everything sits stickered with weight on top for at least four or five days, even if it means telling the client the doors get hung a week later.