I have used resin type car wax on my machines, the liquid type that dries to a whitish film and buffs off easily often removes discolorations and lifts up dirt and grime. I have kept to the glaze type later on, since I suspect the gritty polish can be a bit harsh in the long run. Wear and tear will not go away but some polishes will shine up the finish almost like new and it will last for a year or so on machines I use regularly.
I haven't tried the Renaissance wax yet, it's suppose to be the best and used by museums and conservationists. It doesn't oxidize like other waxes can. The deepest shine is always carnauba blends for some reason, but it's not the longest lasting wax. If the shellac has creased or cracked and the discoloring is under the surface, the only way to get it perfect is to sand it down or pick the loose parts off whith a knife, then carefully apply layers of shellac and rubbing it smooth and plane with the surface.
Last edited by Mickey2; 01-04-2018 at 07:12 AM.