I like to leave the rind on when possible, but if the arrow needs lightened in spine, I'll scrape it without any worries. I also barrel taper them after the last node.. which of course takes the rind off... I don't seal any of my cane arrows and I have only on one occasion had them go crooked. It was a night that was hot and humid, then in poured all night and I left them under the fly of my tent, but with the hard rain, they got soaked anyways, then a cold front came in... by morning they were very warped. So rule #1, don't leave them outside the tent..lol ever since I have brought them inside with me and that day still remains the only day that I had any problems from not sealing. I can hunt in the rain without any problem, so long as i bring them in at night to dry. I think the temperature swing was as much at fault as the moisture.