Yeah, you can't win there. Metal plate screws rust, plastic ones snap and leave your plate on the roadside when you hit a pothole. Stainless can be ok, if you keep an eye on it, but lots of stainless that spends it's time around brake dust and road salt starts to rust. Just look at Cybertrucks and DeLoreans.
I keep seeing newspaper on this thread. 40 years ago, newspaper was the best glass cleaning option. It was a coarse grained unsized (or at least hardly sized) paper that was designed to both accept printer's ink well, and assist in that ink drying as fast as possible. The ink itself, again in the need for speed, would be overloaded with carbon black, because less binder dries faster. That would get carbon black all over your fingers as you read the paper, but it would also rub the carbon into the scratches in your glass, reducing haze and glare, at least momentarily.
None of the above applies today with the advent of post-consumer recycled newsprint paper that is dusty as hell, and with the demise of linotype, the paper is now sized to minimize ink usage (for even higher speeds of printing), which means it's no longer all that absorbant.
If you've still got a basement full of your grandfather's newspaper clippings... well it might work for cleaning glass (I doubt it though, because the high acidity of the paper base will make it all crumbly). but you also have other issues.
I bet you will every time you re-varnish everything.