Thanks for the info. I looked into scarification but unfortunately the rental yards in the area only stock machines that are gas powered and don't have a vacuum. Also the dust generated would be prohibitive in my basement, so sadly I cant go that route. The good news is the chemical stripper I'm using is leaving me with a combination of very well adhered epoxy paint (most likely the first layer from the 50's) and a good amount of bare concrete , so I feel fairly confident that my new paint will hold. Do you know of a bonding primer that will hold to both the concrete and old epoxy? Or heck, do i even need to use primer with two coats of epoxy paint?