X2 or 3 on the wire brush, sandpaper, primer Rustoleum.  Need to let it cure for a week or more, though, before forcing tires on.   I broke the beads just by setting my boot heel right on the bead and bouncing up and down.  Even at 180 pounds that was enough. I did it in the garage door so I could hold on and keep from breaking my neck in the process.   There's also a tire mounting trick with trash bags that some guys say makes the tires jump right on.    
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