I have developed some bright yellow blisters in our cabin chink. Anyone know what these might be caused by? Any thoughts on repairing and remediating? Thanks a ton.
Here are the pics:
https://ibb.co/D9hwzv5
https://ibb.co/NShWKk0
https://ibb.co/FzFTm9S
https://ibb.co/fYPP1JN
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