Step 2: Mixing the concrete
Apply cooking spray or Vaseline to the bottom and sides of the saucers. Wearing a good dust mask and measuring with a 14-oz can, mix 6 cans of masonry sand with 2 cans of Portland cement. Stir with a stake or mix with a gloved hand until the sand and cement are completely combined. Add 2 cans of water and stir until well blended. Add additional water until concrete is like a thick batter, somewhere between crumbly and runny. Dump concrete into saucer until it is half full, pressing into corners.