I believe it was Smithsonian Magazine that reported that the very-first-ever Hard Drive used "iron oxide bearing bridge primer" for the magnetic recording medium. That seems like a euphemism for Rustoleum that avoids using a © or ™ name.

That should certainly be sufficient historical significance to merit someone writing a nostalgic song.

A tag line might be "my bits keep fallin' off 'cause that paint don't dry." By the time the whole idea was poetically exploited (and explained) you'd probably have an easy 30 verses and it could be a filk classic in short order.

Or conspiracy theorists could decide that painted iron bridges are a recording medium for keeping track of peoples movements, and "the bridge remembers every time you cross" with all kinds of clever and fearsome esploitations of the concept.

One might also compose a lament (or maybe a dirge) to note the "passing of the old Rustoleum," as it's now extremely difficult to purchase the old oil-based stuff, at least in my area. Anything with an oil base is mostly missing from the store shelves, for "environmental and safety reasons." The result is that instead of the bit of oil that evaporated from the old primer one must spill a few gallons of TCP to clean any surface that needs to be primed with the latex/acrylic/polymer/water-based replacement Rustoleum, since the new stuff truly "won't stick to anything" unless all the grease/oil/wax/tar/salts/bug-juice is completely removed before priming.

John