https://donsbarn.com/
There's still a lot of Winter weather left to do some cold days research into what's what and what used to be and why some things are they way they are and were.
I posted here in Fishing because of the section under writings where he goes into finishing.
IMHO, it should answer a lot of questions I've seen posed here over the years.
Anyhow - enjoy. I know I've been enjoying seeing a lot of the historical stuff - especially the old Zinsser stuff!