From what I have read on this forum and searching the net it sounds like the Thermogloss finish was a clear nitrocellulose lacquer that was heated up and sprayed over maple. I will be attempting to duplicate the finish and wondered what others think of my game plan. I do not use nitro lacquers anymore on cabinets, I have moved up to post cat conversion varnish's and sealers. They are way more durable finishes than nitro's are. The nitro lacquers would yellow over time giving the old drums that look that everyone loves. So my plan is to have some stain matched up to an old Ludwig drum and use my post cat sealers and varnish to top coat with. That way you have the color going for you but a much better durable, water resistant finish then that of the nitro. The sealer I use fills in the grain and really makes the shell smooth, the glossy top coat will give it the shine.
I have always wanted to try this and will have the chance later this summer. I am doing some drums for a member in this finish. I just wanted to see what you guys think of my plan.