I have skinned a lot of boar, There gits to do. I think to tan them they make take a bit of doing, There is a lot of fat on them at certain times of the year. Also Boar can stink. If you are successful let me know i wouldn't mind one done.
I've skinned a lot of boar and never heard of the skins getting cured . As said there murder to do we scald them in the tank and there's a fair bit of scraping and burning afterwards. There's wool below the hair. As said a lot of fat especially on the saddle at the shoulders