Perhaps this is one of the few areas where standards are well known but I could not locate an answer in the archive...
The seams on the cabin sides of my CC enclosed cruiser (1940, 25') have started to open up (1/8") along the 'S' grooved joint and allowed water to enter and pop the varnish from underneath. A few butt joints also suffer this condition. I want to keep the sides bright and wonder what to do. Can I use mahogany 5200 to seal the joint and varnish over that? Would wood filler, stained, be better? This is not a showroom restoration but I want it to look nice, at least from far away!