hot melt glue didn't work worth a darn, it fell out of the cells with a little bit of pressure.

next try, polyurethane. i'll tape the outside of the cells, fill it with the urethane, then let it dry overnight. then put it in the freezer for awhile then cut out the notches for the seeds with a dremel tool. the reason for the freezer is that i read that polyurethane will cut/grind/shape like steel does when it's cold. if it's room temp, it can melt instead of being grounded away. heck, i can work on it outside, it's cold enough. if that doesn't work, the urethane can be taken off with a wire brush in a drill.

then i'll try the epoxy. my only concern is how difficult it would be "undue" what i've done with epoxy in case i want to go back to corn plates in the future.

how well does epoxy adhere to slightly pitted but rust free cast iron?