https://goo.gl/photos/hHcX4NZWdhUhtda77https://goo.gl/photos/faV5B1BbGdCvtJ5F7Sorry - it's been a while since I posted an on-line photo and I'm struggling to remember how to do it. For now, these links are to photos in a shared album so I think they should be viewable by everyone. If not, somebody let me know and I'll try something else.
This is an 8x12 oval serving bowl cut from some heavily distressed Sycamore. The spalted sycamore has dark markings throughout, and was infested with some small boring bug that left holes and deep texture inside and outside.
After planing, the board is 15/16" thick. The 2 side rings are cut 1/2" thick at an angle = arctan((1/2)/(15/16)) = 28 deg. Glue and Clamp in a bowl clamp. After 5 minutes, remove from clamp and scrape the glue squeeze-out. Re-clamp for 30 minutes or more. Sand-Sand-Sand, then finish with 2 coats of shellac and rub in paste wax using #1000 steel wool.