Snowflake Coaster: One Year Later

After more-or-less constant use under a cup in the bathroom, a Snowflake Coaster has reached the end of its life:

The acrylic flake is fine, but the wood has mildewed:

It’s second from the left in the bottom row:

All except the pair in the left column had a coat or two of rattlecan clear, which suggests wood-ish coasters need something much more durable, along the lines of clearcoat epoxy. No surprise there!