Not TR3, but I have used other resin type polishes. I got a bottle of Auto Glym Super Resin polish, many of them seem like much the same stuff regardless of name. I chose the resin type after reading up on how to preserve old finishes. I neve came to anything conclusive, but the resing polish type will leave a protective film, not harm the shellac and if I'm correct not oxidize over time. There are museum quality polishes made for furniture, based on petrolum waxes; they avoid blends with carnauba, candelia and all the vegetable oils be cause of their oxidizing nature. One of these are called something like Renaissance Wax, but it was hard to find and I haven't tried it yet. The best carnauba waxes gives the highest shine, that is the disavatage, the resin waxes isn't bad at all, but their advantage is the protective and easy cleaning after. It's decades down the line the oxidation issue can result in trouble, it depens on how you think about it. I have polished old cast irion Singers in reasonably good shape, they were not particularly flaky or brittle. Gold decals were not visibly affected at all. Don't use the whitish liquid polishes on crackle finishes, it's a bad idea. Get one of those "sealants" in stead, they will not live a white residue in all the crinkles. The white part I think is some form of polish, or rubbin component, ever so slightly abrasive.
Last edited by Mickey2; 11-17-2015 at 12:15 PM.