Glue on back of salvaged wood

Q: I have removed some oak flooring from a renovation job in a house and plan on installing it in my house. I have removed all the nails from the back but there is some glue on the the back which is sometimes hard and sometimes brittle. What is the best method for removing glue?

This leads to my next question. What is the the best way to re-install the oak strips (type of nails, glues etc.)?

A: If this is 3/8 thick oak strip, I would consider it a waste of effort. By the time you install it and sand it flat there won’t be much left of it. If it is 3/4 thick, perhaps you can remove the adhesive with a belt sander and very coarse belt or even chip it off with a sharp hatchet.