Re: Bottom Blisters
Sandblasting and barrier coating has limited success, normally it's the laminate that has the blisters so removing the gel coat doesn't really help much. If just a barrier coat is applied, over time water will still get into the laminate and the blisters will return.
The best method is to remove all the blisters then re-glass the hull with epoxy or VE resin, this is costly and time consuming, but if don't want them to return it's the best method.
Blisters are more of a cosmetic problem, so a total and sure fire fix is not normally really needed, it just depends on how much they bother you.
