@Cathy… yes I used a popsickle stick with sand paper to sand the inside edged… not so much fun… No finish… I was debating about this, but they are supposed to be useful, and I they need to be extremely heat resistant, and I though varnish or poly would probably not be good for the bottom of a pot… I almost put mineral oil on it… but then decided against it.
What would you guys have used for finish on these… ???