I had tens of thousands of very tiny blisters on the bottom my T37 #373 when I bought it--that was computed in the price. Had it peeled and reglassed and had the bottom re faired and did a lot of the scut work myself with a glass guy. I judged that the blisters were between the gelcoat and the glass and were most likely caused by a barrier coat applied while the hull was wet, but I can't be sure. It had a barrier coat on it and I assume they did not put that on over blisters. There were no real voids in the glass underneath. There was one spot where the glass had not been properly wetted out over the strut, and a void in the glass there, but there was no evidence that water had penetrated it(!). I do have a couple voids in the topside gelcoat, but--as you say--they have not caused a problem. It could have been that they messed up the timing on laying the glass over the gelcoat--I have heard that is critical and my boat was made in Hamlet NC where I am guessing controlling the heat and humidity would be a feat. The design and layup schedule was good, and the layup more or less adequate for tabbing etc. Some of the non structural glasswork used to hold up the floors and furniture was really done badly. Ray
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