On the hottest day of summer, the most Canadian thing I have even encountered happened to me. The neighbour's kid was going door-to-door selling used hockey pucks.
It was above 40° outside, so the boy was roasting. I don't know where he managed to get them, but he had his little red wagon filled with hockey pucks, maybe a couple hundred or so. Quite a few of them looked like game pucks or souvenirs, and some I believe were tournament pucks. He was selling them on the street to make money to buy ice cream. I bought a couple of pucks that I thought were nifty.
Then I saw he had two or three dozen blank pucks. I doubted anyone would buy those. A flash of insight led me to purchase all of the blanks: what if I painted artwork on them? The value added should no doubt fetch a high price. So, I'm going to paint hockey pucks, and the boy and I can sell them and we will split the profits. I figure custom-painted hockey pucks will be popular at Christmas!
Intuition assured me that a regulation hockey puck would fit precisely within a Mason jar lid. I think I may have even saw this in a dream. I tested out my theory, and the fit is exact. I am using the inside rim of the lid to draw the outer edge of the paintable area of each puck. It's easier than using a compass.
I'm painting the pucks with gesso, since gesso sticks to most surfaces and itself provides primer for acrylic paint. I'll fill in the circles with white gesso and sand them smooth.