Done
Books could/should be written about these meters and their use in casual surveys, and their misuse. Similar to blisters, IMHO. Moisture meters do not read moisture...they read relative capacitance and can be affected/effected by nearby metal, metal below, and differences in layup and core material. If the surveyor counts only on his casual use as gospel...every buyer is likely to walk. The surveyor should give an even handed, honest description of the condition and the consequences of buying a boat that he finds "wet". Also IMHO, he should be honest and tell the buyer all boats will have moisture readings of XX%, and compare that to what this boat shows...but they don't. And likely won't for a host of other reasons (i.e. liability, reputation, etc)
Some buyers, at the simple mention of moisture and blisters will kill the deal. They are afraid...of the cost, the repair, the failure, the hype and the criticism of fellow boaters.
For moisture, ANYWHERE there is a screw, cowl, hatch, stanchion - ANYTHING that penetrates in to the deck, there will be moisture of some kind and at some point in the boat's life.
My boat, by design has several penetrations that, at the time seemed a good idea, are no longer used. Although not wet, my surveyor was quick to point out that the underdeck jib sheet path should be abandoned, cleaned and sealed/epoxied to eliminate the chance of those two holes becoming a problem down the line.
Sadly you can spend hundreds/thousands repairing the stanchion holes, and an unknowing surveyor can dink the deal by reading too close to the metal. If you fix these, I would remove them and all their support metal, make the repair and then have a reputable surveyor "read" them or better yet get an imaging system picture...it will cost you...but that info and a letter to "prospective buyer" attached by the surveyor may help...
All the best, and I am sure that others will post as well. There are several good writeups on the use/abuse of moisture meters on this list....