Question about applying WOP over oil

In another thread, a number of folks mentioned applying an oil finish on a burl project followed by a wipe on poly. I have a few questions along these lines:

1. What type of oil lends itself to this protocol? Walnut Oil? Danish oil? BLO? Does it matter?


2. I presume the purpose is to make the burl figure pop prior to protecting it with the poly. Is there any reason such a strategy should be confined to burls? I'm thinking any figured wood would benefit. Sound about right?


3. I presume the oil needs to completely cure before applying the first coat of WOP. How long might that take?


4. How many applications of oil? more than one?

(85f)

Question about applying WOP over oil