For legs, depilatories, epilators, and waxing are fine. These are not good options for the temporary chest hair removal. The chest is much more sensitive and is subject ingrown hair and rashes. Legs seem to handle these much better.
For temporary hair removal on the chest, shaving is the best option. I've tried them all and yes, some offer longer results but that is mitigated by the irritation that resulted.
It takes just a few minutes to shave the chest in the shower each morning and you're pretty much good for the day.
For longer term, ILP will take care of the darker hairs. HRT will help too. Shaving the lighter color hairs Will still need to be done, but not as often.
Paulie.