parts of my basement had 6x6 asbestos tiles that were what appears to be a tar like stuff sticking them to the concrete..i've removed almost all of them and now want to paint the floor..any ideas...can i just paint over the tar residue..most of the tiles have been gone for a while now but the cement is still black where they were..i wanna do this cheap..i was goingto get regular paint and give it a go...for 30 bucks a gallon h.d sells a one part epoxy paint for this purpose but will it adhere to the tar residue..thank in advance for the ideas