The Monk 36 is a great, great boat. We just sold ours that we restored and owned for the last 3 years. When we bought ours she had numerous small blisters- looked like she had chicken pox.
For the price point boat the older Monk's are in, I can't see spending the $$ for a bottom peal and barrier coat...couldn't tell you the # of boats I've seen do that only to have blisters again a couple of years later. We hauled our Monk out of the water, ground them out, let them dry, epoxied in where they had been, and then new bottom paint. 3 years later when we just sold her she had maybe 4-5 small blisters that were not a big deal at all. Small, hard blisters that are dry do no concern me personally...it's when they get to be larger blisters over a golf ball size or bigger that you can start getting into delamination issues. As one marina yard manager friend of mine put it, "I've not seen a boat sink from blisters but I've seen lots of price negotiation because of them."