maintaining a clean porous surface on concrete


i need to maintain a clean and porous surface on my basement floor in order to apply a waterproofing product. unfortunately half of it was covered with those cheap linoleum squares and the adhesive that remains is a thin layer of super stiff puddy. i spent a whole day doing about 80 sq/ft. hitting it with an angle grinder. first with a steel brush attachment to remove the bulk, then with a cement attachment to remove the residual. the tricky part is i needed to remove the right amount of cement as i take off the adhesive. otherwise the grinder gets gummed up and just spreads the adhesive around. very tedious.
i feel like i need to stick with a mechanical method as the concrete is supposed to have an open and clean surface for application. i don't want to risk using some degumming agent or lacquer thinner.
any ideas? i'm thinking i'd have to rent some pro-ish floor refinishing gear. i'm in san francisco so maybe that wouldn't be too hard.
much thanks
-- Probably the earliest flyswatters were nothing more than some sort of striking surface attached to the end of a long stick.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Acid might work if you have a way of rinsing it off.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.