Re: Coaster brale arm removal?
Most coaster brakes are quite similar. With the wheel removed, hold the brake arm with one hand and loosen the nut holding it on with the other. The arm should lift off the hub. Note that it may be keyed. That is, the center hole is slotted or has flats on two sides that mate up with the cone nut.
As far as bending goes, that depends on the quality of the hub. Some arms are hardened steel. Good luck with these. I had one from a Shimano hub that even when heated cherry red took VERY hard 3# sledge blows to get it to budge even just a little and it took repeated attempts. Others are just regular steel and are easier to bend but I would still heat it rather than just banging on it with a hammer.
Hope this helps and good luck.