YES, SHOULD WORK GREAT FOR THAT.
Very good product to use, depends on your situation, might want to use 6 inch verse 8 inch. Definitely paint prior.
It would, but definitely need to paint and seal.
I think it would work fine. I did mine with shiplap.
When the entire board is used in a flat configuration I would not exceed 25 pounds. When the board it put vertically with the "8 inch" side being up and down, the board can withstand 75 pounds.
Normally white wood is pine and what I bought was as well.
Yes. Just be sure to use a primer that seals the wood, than paint.
.75 inchs by 7.5 inches
Sometimes they have shorter boards for sale. However, if you have to buy the entire board they will cut it for you.
Probably, but you will have to trim it to the appropriate length and width.