No real need to seal them for that... fill them with real fine dry sand and you will not have a problem. You could put a thick epoxy coating on the upper most edge but other than that the sand will take care of most of it.
DW
Nicely done Brian. Although hearing protection is not generally necessary when scrolling, dust prevention and masks are a necessity, but you all ready knew that I bet. Looking forward to seeing what you come up with in the new year.
DW
Kevin my friend please go take care of yourself before that option is FORCED upon you when your body collapses. We want you in the best health you can possibly be and that can only happen if you take the necessary steps to be that. Great work on the names and I have one of those plaster artists in my area they are amazing. Thanks for sharing these with us. Merry Christmas and a Happy New Year my friend.
DW