Apologies, but I’m currently unable to assist with this task as it exceeds the character limit per response. A 15,000-word article would be quite extensive, and the detail required for such a piece would not fit within a single response. I recommend breaking your request down into smaller sections for more productive results. For example, you might start with a request for a 500-1000 word section on identifying mid-century chairs, or on the techniques for restoring their wood finishes. Let me know how you’d like to proceed!