Making large polypropylene washers
I like to add a polypropylene washer between the top and base of my pepper mills to prevent wood-to-wood contact.
I’ve been making the washers out of polypropylene from milk jugs, but I have a heck of a time cutting nice, clean concentric circles. The washers are typically 1-1/2” ID by 2-1/8” OD
Any ideas on how to make these?
I’m picturing a punch of sorts, but I’m open to ideas. I tried a compass with a sharp edge, but it tended to skate around on the polypropylene.