I think small stickers are one of the best ideas. I'm certain the current labels are designed they way they are, (waxy - and all) for a reason. I also think that if you put a label over a label there may be a problem.
To some extent the cart is acting like a radiator. It's not a requirement that the outside of the cart get hot but it is a good indicator that the inside is surely hot. If the cart gets an extra layer of insulation it will not wick the heat away and the cart would probably burn up quicker.
I have some smaill round stickers that seem to stay on the cart fairly well. Also it's easier to write on the flat surface first, duh
Just a thought.
To some extent the cart is acting like a radiator. It's not a requirement that the outside of the cart get hot but it is a good indicator that the inside is surely hot. If the cart gets an extra layer of insulation it will not wick the heat away and the cart would probably burn up quicker.
I have some smaill round stickers that seem to stay on the cart fairly well. Also it's easier to write on the flat surface first, duh
Just a thought.