I usually soak the area with liquid wrench and then use a wire brush to remove debris and rust. If you use a lubricant when you reinstall, use it sparingly so it won't melt or run on your rotor/shoe surfaces.

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2000 F-150 XL,RC,LB,5.4,4R70W,3.55LS,
4-wheel disc/ABS,Chestnut/Parchment,
Ford bedliner & gas/wheel/spare locks,
3" cold air box modification,Superchip,
Dynomax ultra-flow welded 3" cat-back.

 

... or at least they were. finally got them off, now; what about coating the hub w/ anti-sieze compound - will this make it easier to remove the drums next time?