No argument ru-glyde or the equivalent is the preferred choice. I've been through a couple gallons over the years, plus a gallon or two of a homemade version (the ingredients are printed on the package after all, or at least they once were), as well as other tire lube specific products. But I'm not going to lose sleep over the fact that I've used Windex over the years either. I haven't found a definitive answer whether it's harmful to aluminum, but I'm not going to doubt the personal experience of someone. I do wonder if perhaps the composition and treatment of alloys on vintage bikes makes it more of a problem there.