Not all the rivets on these hulls are universal type heads, only those used on the seams at the transom and spray rails, the rest are brazier head style.
I can get brazier head style rivets in the soft alloy but I don't seem to find soft alloy universal head rivets around here. The problem is I've yet to find them locally in the exact proper head style. Since the inside shows on these boats I prefer not to use a pop type rivet, especially where one odd rivet will stand out in the open. I've been using rivets intended for truck bodies, their a soft 5056 chromated alloy buck type solid rivet. I've not run into one with this issue on a boat that I can say has never seen saltwater. Those year Grumman hulls sure to look like Lowe hulls, and the same position rivets are those I find broken all the time. Both Grumman and Lowe branded hulls, which I believe at that time were either the same or related through a corporate link.
In the past 2 months I've seen over two dozen popped rivets in two brands of boats. What I've been doing it working the metal back into shape and re-riveting, but I'm concerned as to whether the original rivets lost their heads due to stress or some sort of corrosion due to a mismatched alloy combination. There's a lot of places where the metal is gathered or buckled where they came to the end or at a curve. They used some sort of thick filler rubber between all the seams and unlike Starcraft they use only one row of rivets. I'm a bit concerned because lately I've run across a rash of these boats with popped rivets, all from the early to mid 90's era. The heads are small in comparison to rivet shank size compared to the OEM Starcraft rivets. I do suspect they use something pretty soft but on the Lowe hull they look most like the universal head style rivet.
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