I'd say that a good, two-part LPU sprayed paint job will be as good and long-lasting as the gelcoat, but that is not a casual proposition, and what Booker says is true about most "home" paint jobs.
I think the "pumpkin" interiors are cool, in a retro way, but that's just me. And the gelcoat is wonderfully hard and glossy.
And yeah, 1971....very early Trillium
I don't know if anyone has ever found the exact plastic moldings that Trillium
used on their interior seams, althoug people have made things work by trimming, etc. (I'm talking about the seam trim that fits into the little rail in between the insulation's panels.) If yours are just shriveled, you can put them in hot (near boiling, from what I've read) water and they will stretch back out "good as new."