butchlambert
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Possibly water in the air, trapped solvent from pounding on primer and clear without waiting for proper flash times, mould release agent as @Dusty Stevens suggested, or any combination of would be my guess.
If you popped a bubble could you smell solvent?
No I didn't pop any bubbles and smell them. Somebody else is worrying about them 20 years ago. I've seen and owned a few nice ones. Actually until I found Kavanaugh the problem I had was they would use too much material and it was a problem making weight.

















