In and of itself, "wainscot" is not a hyphenated word. Should you desire to craft a compound word, such as "walnut-wainscoted", I believe that that would be acceptable.
Wainscot is a term commonly used in woodwork. It can refer to paneling, which would line interior walls. Wainscot would usually be in oak wood form.
Common Wainscot was created in 1758.
Smoky Wainscot was created in 1808.
A wainscot is an area of wooden panelling on the lower part of a room's walls.
Shoulder-striped Wainscot was created in 1761.
The noun phrase 'four week vacation' does not need to be hyphenated.
High quality oakwood panelling of walls.
"Custom tailored" is hyphenated when it precedes whatever it modifies, so you would hyphenate it in forms like "a custom-tailored suit". However, if it is a predicate adjective, it is not hyphenated, so you would say, "All his suits are custom tailored."
Yes, it should be hyphenated like so: sixteen-year-old boys.
They come in 30 and 36 inches.
Yes, "54-mile" would be hyphenated when used as an adjective to describe a noun, such as "54-mile race."
It is not hyphenated.