Rust rings from shaving cream cans
I buy Gillette shaving cream at Costco. I know that the wet can makes rust rings on whatever it's sitting on. The old shower floor in my master bath (the one piece kind, not tile) has marks on it from before I learned to set the can on something else (upturned Fage container).
So, now I have a remodeled guest bath with a nice niche lined with white subways. Rust circles will be a no-no. I tested a spare tile in my other bathroom and rings formed overnight. I could get them out with Softscrub and a little elbow grease. I just hate the idea of it now.
What do you all do? You'd think shaving cream mfrs would figure out a way to put a plastic, noncorrosive bottom on their cans. It's so annoying.