Just a thought, but…
Have you considered applying a thin coating of some sort of high-temp grease to the inside of your deodorant tube before filling with molten wax?
Kind of like greasing a Bundt mold so the cake releases once it’s done baking.
I like the idea of roll-out wax though.
Personally, the @Mean salto method of a sealable plastic bag has been working for me for ages, but I applaud your creativity.
Zippered sandwich bag is definitely the easy solution for storage and transport. Kind of wish I hadn't seen those empty deodorant tubes sitting around now haha.
This make me wonder though after doing a bunch of googling about different waxes while nobody uses automotive wax made from carnuba?
It goes on as a paste then once dried and buffed is hard and slick and durable in adverse weather. I mean your car gets sun and rain on it all year long and that wax lasts quite a while.
I'm definitely going to have to slap some on my board and see how it goes.
If I find a neglected curb I might try some on there too to see what's what.