What is the right preparation for resin flooring?

Having completed several, different forms of mechanical preparation on the one concrete slab, I couldn't help but wonder: What is the right prep?

Perhaps we have got the idea of CSP all wrong? Or, maybe we are using it the wrong way around?

If our focus should really be on penetration into the substrate rather than profile of the substrate, then what penetration tests should we perform to work out if we have done the right prep?