Dollar Dollar Bill Y'All
One of my favorite things about the location of my shop might surprise you. It's the Dollar store around the corner.
There's been many times I was in the middle of something and needed some random thing that I could get at the Dollar store.
Some of the items I've bought at the Dollar store so far
Today it was ziploc bags to save some grain filler I mixed up with custom pigments.
Custom tinted grain filler
I don't recommend their home improvement stuff though. Especially not the painting supplies. I tried one of their paint rollers once. It left all kinds of fibers and crap in my finish. The plastic drop cloths might be ok.