Puncture spray cans
The local scrapyard wouldn’t accept empty aerosol containers unless there was a hole in the can. So I glued a PVC cap to one end of a pipe and a cleanout plug on the other. I drilled the cleanout cap to make a ramrod out of metal pipe with a sharpened air chuck to create a spear. I drop the aerosol can in nozzle-end down, screw the cleanout cap on, and drop the ramrod to spear the can. The PVC contains any remnants of paint or other substance.
Tom McCormick of North Liberty, Indiana