Can anyone suggest what causes dime-sized and bigger bubbling when coating the bottom of a 10 year old cedar-strip canoe with West System epoxy? And maybe a fix for the problem? I removed the old epoxy, which had delaminated. (This should have given me a clue that there was a problem....) I did not use any abrasives or cloths - I just cut out the old material and reapplied
SOMETHING is reacting and off-gassing, but I have not a clue what is going on. I know that rising temperatures can cause some bubbling, but this is silly. And I do admit that the first try was done in the morning. The second try was at noon, though, so it was not cold. Same result.