If you look at a sodablasted hull, it has a very fine tooth to it, much like what a good sanding prep job would leave behind, Sodablasting is definitely the way to go, if you have to remove all of the paint and want to do it quickly and cost-effectively IMHO.
Have you popped any of those little blisters. If you haven't, you probably should, but do so wearing googles/safety glasses and gloves, since osmotic blisters are filled with nasty chemicals at relatively high pressures. If the blisters are dry, and not filled with liquid, it is more likely that they're small layup voids, since osmotic blisters would be wet. If they're not wet, just fill them with thickened epoxy and paint over them.
For barrier coating, I prefer to use Interprotect 2000E. The main reason I like using the IP2KE is ease of use and application. I've described my method for applying it, using the two different colors, white and grey, to make it as simple to apply as possible, especially when working around the boat stands on this site before. If either you or Barry want me to dig it up, I can repost the technique in this thread.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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Still—DON'T READ THAT POST AGAIN.