Find a safe liquid paint remover so you can strip it without creating any dust particles from the paint. Safely store the removed paint and spent remover and take it to a hazmat disposal event. Or otherwise as directed by such products' instructions.
Regarding upside down and even sideways photos, ctrl. alt arrow keys flips your screen upside down, sideways (left or right) and back upside right again. Using Microsoft Windows, that is. Maybe other OS's do that too.
When they install most of the robots I program they just hammer drill through the concrete to the necessary depth, insert threaded rod or suitable fastener, and have a very strong epoxy in the hole as well.
It would be pretty thick to tackle with a plasma cutter. I have some hours into making the first cut on one of mine with a 14" chop saw that I thought would make quick work of it. Wheel kept glazing on me. I also got a heavier duty extension cord to make sure it would carry the amps the saw needed. It did up the amps, I tripped a breaker. A little interweb research seems to show that I should have had it positioned long side up instead of down. Easier said than done when the dang thing weighs like 300#.