Today's washer fluids are now a regulated formula by the EPA, it's mostly ethanol. In time, it will corrode just like the calcium chloride.
There are 2 antifreeze formula's. the unsafe for pets and farm animals and the pet safe. The pink RV/Marine is the safe stuff. Propylene glycol will not cause rust, it is very slippery, and we eat it on our BBQ ribs, in salad dressings, in soft ice cream and gummy bears. Yes, for real. It is an FDA approved sweetener and it's also in many diabetic labeled foods too. (and don't get me going about the FAKE black olives either).
The ethylene glycol formulas will eat thru today's inner tubes. And the stupid so called Long Life antifreeze (OAT or HOAT) has only 33% corrosion protection compared to the old school green stuff with 99% protection. Thus, the inside of the rims will rust sooner.
Now, there are full formulas for radiator pet safe as well, but you are correct in stating, 'which is cheaper'. Thus, it's either the Beet Juice or the pink safe stuff.
Cost wise, mounted wheel weights are the way to go. The 2N, 8N, 9N, and the other later models use these.
And even today, some of the Caterpillar machines use this too. You would only need 6-halves. They fit on the INSIDE of the rim, unseen really.
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Over the years, I've seen these painted red, white or black.
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