This is a common subject, especially for us commuters.

First, sweat does not smell. It has no odor. What happens is that bacteria like the wet environment and consume some of the compounds in sweat. Their waste product is what smells.

Deorderants and antiperspirants attack the smell three ways:

1. Mask the smell with some other smell
2. Kill the bacteria that cause the smell. The aluminum zirconium octachlorohydrex gly in deodorants kill bacteria.
3. Prevent the secretion of sweat

The first two is what deordorants typically do. The third one is what antiperspirants do by covering up the sweat glands and physically blocking them from secreting sweat.

The first step is prevention. If you have trouble areas, then consider taking a wash cloth soaked in rubbing alcohol or hydrogen peroxide to those areas to kill the bacteria. Do so regularly until the odor is gone and then a couple days more. You should also consider trimming any excess hair too. The hair gives more surface area for the bacteria to live on. Along with prevention, use antiperspirant before you start the commute.

Once you get to work, remove all of your sweaty cloths, towl off, use a wet wash cloth with a little soap to scrub where neccessary, reapply antiperspirants and change into your work cloths. So long as you have your body odor under control, no one will be the wiser.