The original panels in my 32 were pretty much gone, so I replaced them with 1/4" marine ply. They are all held in place by mouldings and trim, that screw to the aluminum and support the edges of the panels. If you have them out, be sure to do any wiring you think you might need (just put the wire in place, hook up later) and insulate behind them before reinstalling. I used Reflectix on the 32, far easier than the hard foam cut to fit between the ribs that went into the 28. I could not get out the panel over the head and the one over the lower helm, so they are still in there.
I primed and painted the panels, but if I had it to do over I would get some sticky-back vinyl cover for them, sort of like the originals. You can buy panels with vinyl on them, but not marine grade, that I could find. The paint, even marine, does not clean up as easily as the plastic.
1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
