Help! I have a mosaic question

Kansas City, MO

I am making a mosaic as a memorial for a student at my school. Students decorated ceramic tiles for the border and the center is a glass mosaic of a shooting star. My question is this: We had planned to coat the finished glass mosaic with an epoxy resin to cover any sharp edges because this will hang in the hall at school. I have never covered grout with epoxy before but assumed it would be okay. Does anyone see a problem with this?

Thank you for your help!

Thumbnail by artlilly
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