As Island Trader said, those aren't blisters, which are typically much bigger. It's just what happens when you soda blast gel coat. Had mine soda blasted and got the same thing. I think the problem is that the moon suit the guy uses has such poor visibility that they can't tell how hard they're blasting it. That stuff is a lot more aggressive than advertised! Here's
a post I did about it a few years ago. Unfortunately the damn Photobucket outfit evidently removed the slideshows I had put together, so the links in it don't work anymore, but here's a link to the photobucket folder
http://s188.photobucket.com/user/dkb...?sort=6&page=1 with all the pics in it that should give you the general idea.
BTW, can anyone recommend a less user-hostile and less ad-cluttered site than Photobucket?!