AS for the use of 5200 on ACP I found this was the best to use as many others would simply peel away easily. I concur with you about the use of 5200 on deck applications but ACP is different and I got frustrated when other sealants failed quickly. ACP was trial and error when first working on them and very frustrating to find what worked and did not work. Dave Eck who owned JY was an expert who taught me a lot and I went beyond just thru trial and error and reported back to many what worked for me. Anyone can read books but two good friends of mine told me when I first started in this business, "Learn from the salty seadogs who are knowledgable and experienced and you will go far." Names withheld but widely respected.
The designs of the smaller boats by Hunter were excellent but now I will say from the beginning I was never a fan of ACP but fiberglass for sure. As for the issues with ACP, many of the boats are fine but those reported cracking, well I had some as a dealer and got into why this occurred from an investigative standpoint. Every time, the basic core root was the changing of the chemical composition by the mfg. without the knowledge of JY or Hunter. As for the ACP boats, the smaller ones can take more abuse without being damaged when other fiberglass boats could be but so often when a previous owner sells, we never know what abuse these have gone thru. One thing to note when drilling thru for bolts or screws you, the hole has to be big enough for the bolt or screw to go thru or a crack will develop there. I know what Hunter did to make sure as to manufacturing but in the end, they went back to fiberglass. As for Acetone, I know from trial and error for use as a cleaner is not good on this product nor on lexan. The large grey or black rubrails seen on the bigger boats, yes you can use it as a cleaner but done quickly and changing out the rags often. There are other ways to clean as well.
As for contributing, I gain nothing from doing so as I do not even own a model sailboat. I have a mountain to take care of where I live which requires a lot of my time but in addition I like to camp, hike, hunt, volunteer at the church and as an elder advocate and now will start building an N scale model layout in the basement besides my time with my two grandsons.
As for Hunter going bankrupt, there is more to the story. Hunter was 1/4 of a corporation that was still profitable when the corporation went into bankruptcy. They were using the profits to keep up the other three power boat companies from going into default but in the end, they couldn't. If Hunter had been on their own, the old Hunter would have survived.
Yes I know too much but a lot will never be discussed. Like I tell folks, I know more but often best to leave that alone. As for my personal history, I have experienced more than most but that is my life which is not open for discussion.