1. What is the proper adhesive to use to replace these pieces?
I've tried weatherstrip adhesive, and Shoe Goo. Not very good results over time with either.
3. Is it real wood?
Yes.
4. If I get lazy and don't re-apply these pieces, is there a market for them?
Only if they're not cracked, and if you also remove the aluminum backing from the dash and send it along too. -- Jim