I'd be inclined to use a D-A and some 80-grit after degreasing the top.
Depending on the intended use, maybe no new paint, progressively finer grits until you get as smooth a surface as you want.
Or cover it with a metal sheet, wood, whatever - again depending on intended use.
For repainting I'm thinking some kind of 2-part epoxy for fuel/solvent resistance.
I'll bet that paint is pretty thin so 80 may be a bit aggressive IMO. Id start with something like maybe 320 and go down if needed or try the oven cleaner. Acetone with a SS kitchen scrub might work in a well ventilated area
