Why does Nu Finish seem to be the overwhelmingly preferred automotive product of the portion of reloaders that use automotive products? Why are Mother's, Turtle Wax, Meguiars, Griot's, Liquid Glass, Zymol and others so under-represented? I mean, in the automotive synthetic polymer sealant/protectant market, Nu Finish was a leading product in the 1970's. If there are better automotive paint finish sealant products on the market, why aren't reloaders that want to use Nu Finish considering them instead?
Maybe I should be clear about what Nu Finish is since Reed-Union misrepresents it. It is neither a wax nor a polish. It is not abrasive and does not smooth a surface. It is a synthetic polymer sealant, and no it does not practically last a year on your car. Interestingly enough Reed-Union is not an automotive products company (they were a paint and varnish company and Nu Finish was their one break-out product and still is) and they don't have any position in the professional car detailing market. Comparable products from leaders in consumer and professional car detailing would be Mother's Synthetic Wax (which is not a wax at all, but a sealant like Nu Finish), and Meguiars Ultimate Wax (also not a wax but a sealant), or Chemical Guys Micro Finish Factory Paint Sealant.
The automotive sealant products do not achieve a shine on brass, but they could possibly protect brass to some degree from tarnishing. Shine could be achieved to varying degrees with mechanical abrasive action of walnut shell, silicon carbide, stainless pins or with the chemical action of citric acid (lemishine) as examples.