It looks like the taping technique I used worked out pretty well for this seaglass mirror. The tape came off easily for the most part, and I was able to trim the excess resin on the edges with a glass scraper.
Tag: seaglass
Sea Glass Mirror, take 2, cont.
I keep forgetting to take incremental photos, but below is a snapshot of the blue seaglass mirror with the resin poured and spread. I used painters tape around the edges to contain the resin, though I will likely end up trimming some of it off anyhow.