I'd love to see a video on wax selection, both for racers and freestyle/big mountain. Also, how often to wax. For big mountain, I'm always debating whether it's better to use universal wax in most cases, or if it's junk and I should always use temp specific.
Been doing this for a decade - If you can keep a little shop set up, there’s no harm in waxing before each trip. Wax is so cheap I always prefer riding on a fresh base. You’ll see your board/skis get white towards the edges and it’ll start to feel dry. I’ve gotten 7 days in powder pretty easily but on groomers/ice usually 2-3 days. If you need P-Tex you’ll need to wax over it regardless. Universal is fine for most cases, but if it’ll be super hot/cold I’ll mix in some of the appropriate temp. As long as the wax is smooth and even you’ll be fine.