Removing Old Vinyl from Maple Floor

[Collin Maas]

I found some good looking maple flooring under the old vinyl in the kitchen of the SFR that I'm remodeling. In most locations it came right up. There is a section in the middle where the stuff is really stuck down. I have a before and after picture after several hours of work removing the vinyl. I've tried using a hammer and chisel but have had the "best" results using a heat gun and a stiff paint scraper. My best guess is this stuff has been there since before the 1940's. I'm planning on removing the stuff and sanding and refinishing the floor with 24, 50 and 100 grit. Did other sections of floor that were covered with carpeting and they turned out great.

2 questions.

1)Is there a better way to remove this than a heat gun and scraper

2) I'm going to be using a floor sander with starting at 24 grit.  Any idea how that will work with some of the residue from the old floor still on the maple?