what year is this boat?
I had a long talk with Sal Jr over at OC Boat repair about this issue. We are currently fighting it with the Wriedt.
The issue is that back in the early years, most of the companys that did metalflake boats used a metalflake that had some sort of wax coating on it that corroded the gel over time. from what i was told is they have done some extensive lab testing with the stuff and found that they use some sort of sealer then gel over it with new stuff.
i've been researching gelcoat for awhile now and i still feel like i have no idea wtf im talking about 1/2 the time.