Here is a bowl turned out of second Growth Redwood sitting on a Old Growth Redwood Table. This piece caught my eye because of the color and the large growth rings.
Redwood is soft and brash, the spring growth rings are harder than the summer growth rings, over sanding will cause the summer wood to be lower than the spring wood, this is because the summer wood is soft. Sometimes this is a nice effect.
Note the pitch pockets, Redwood generally does not have much pitch but when it does it is nasty and will continue to ooze through your finish. The way I solved this problem was to warm the bowl in my kiln and then blow the pitch out with high pressure air and wipe the pitch off with paint thinner. You may have to repeat this process until the pitch is gone.