Did you ever re-open a can of paint only to find an icky mess? That's what happened when I opened a leftover can of Louis Blue (ASCP). Boutique paint is expensive, so it's worth taking the time to save it.
Time: 5 MinutesCost: $2Difficulty: Easy
The problem is easily avoided in the first place by simply cleaning the lid and rim thoroughly when done painting. I always do that. Except perhaps this one time. No worries though since it is easy to fix.
I secured a double layer of cheesecloth with a rubber-band to a new paint can. The empty paint can was a couple bucks from Home Depot. But I wonder if they carry them at the Dollar Store? I'll be sure to check the next time I'm there.