i don't Kitesurf, looks fun. we sail an Ericson 35 II. with a 6.0 Lost Sub Driver and a 6.8 Ricky Carroll quad egg thing.
just get a board sock to keep the wax off the boat
There is a way to rough up the gloss with sandpaper that is surprisingly grippy. Not sure of the grit and you would need to be sure not to cut through to the hot coat but I have read that it is just as positive as wax. There was a product years ago in spray can that was great and it didnt rip you up even as much as wax would. Unfortunately its not made anymore. They do still sell peel and stick transparent traction that wont tear you up either, but it's expensive.
Xm surf more has a good clear grip sticker I put on all my boards and have used for at least 8 years. I wax on top of it. With anything like that you gotta trim it so that it doesn't touch your thighs though
Only for SUPs guys.