I have used TR3 with much success on machines that have a good strong clear coat. I like the extra coat of protection it gives the machine.
I don't get it near my oldies as I am fairly sure it will remove paint or decals. I have heard of stories of it silvering decals quickly on machines with perished clear coat. I would recommend testing any wax type product on a hidden corner to see the results before attacking an entire machine.
Suzanne