Just kinda take the sharp corners off and smooth them out. you dont need to go hog wild and grind the whole thing. But if they are deep then smooth them as much as you can and make it easier for the brake shoe to move back and forth.

Good luck.

 

sounds good I'll give it a shot

got the drums turned at this tire shop, for free! they were supposed to be 15 bucks each, but my dad knows the guy well enough he just handed them to us. 30 bucks saved!