How do I remove THIN layer of carpet glue from concrete?
We ended up using Krud Kutter Adhesive Remover, several pots of boiling water combined with a sturdy long handled floor scraper (&amp; elbo grease) followed by a large orbital sander with 60 grit sanding screens. 

This still didn't get all of the adhesive off :( but we have enough off and it's smooth enough for us to paint the floor, based on what I've been told &amp; read online. 

Hopefully, this will be helpful for someone else later on :)