I meant the linseed oil… but yes, cedar a great option. I made a cedar “sandbox” once. Burned before installation. 
Discussion
Oh sorry, the boiled linseed oil is used for the burned siding as a protection coat. I am learning that the more traditional finishes like varnish and oil weather WAY better than the water based modern finishes they sell now and if they do weather, they look good.
Cool sandbox!
