The rules for disposing of latex paint around here require that it be “dried with sawdust”, whatever that means. Over the years we’ve accumulated quite a lot of latex paint, in addition to a rich stockpile that Came With The House™, and I simply don’t have that much sawdust.
Since they don’t seem to object to dried latex paint, I made a drying tub by stapling aluminum flashing around a stand that used to hold a water heater off the basement floor, lined it with heavy plastic, and started pouring latex paint into it:
After a year of intermittently dumping paint, that solid latex cookie must be two inches thick and I suppose it’s time to toss the first batch.
For what it’s worth, I discovered that storing paint cans upside down doesn’t guarantee that the paint remains fresh. This can had a solid latex cookie against the lid, with plenty of corrosion to go around:
The coagulated paint above the latex cookie was as horrible as you might expect.
Memo to Self: just throw it out, OK?