I think anything that isn't an antiperspirant has to be applied directly after a shower when bacteria has been cleaned off. Not sure about alcohol though, that also seems like it might be rough on the skin. I'm telling you though, magnesium hydroxide (er, milk of magnesia) is the best thing ever.

I often get rash from deodorants too. I've been using alcohol and Purell hand sanitizer on the armpits with great results for the last few months. I apply alcohol after the shower, before the ride and after I clean up after the ride. Then the hand sanitizer. Both kill bacteria effectively, it seems. I can actually get through the day reapplying the Purell stuff once or twice without using any deodorant. And no rash. Just don't apply any of those on warm skin right after shower, let it cool of or it may itch.

I've used UARMSOL deodorant for many years now, it's a fine powder deodorant i carry it in small jar and I have had no problems with it. Now I have no more armpit odours. Even when I sweat I don't have any odours, this deodorant works great and I'm loving it. I can't go out in the day without putting it on. I used to have very funky like cockroach smell, now no more. Even when I sweat my armpits don't have any smell. I applied 1 pinch and it's all to it for the whole day without worries about any smell afterwards, or any mess of stickiness. There's no after sport smell or odour masking. I would recommend it to anyone who has underarm odour.

+1 more for alcohol

I use it on my whole body when I get to work. I would imagine that hand sanitizer would work well too.

Alcohol would dry up my skin and I'm very sensitive to it
 

With the deodorant powder I don't need to apply anything extra. Since I have very hairy armpit, the powder works even better ! No need to waste money on anything else.

I got lucky right off with the deodorant crystal you find in stores like Whole Foods. It's in a typical roll-on container and works fine for me. I tried a few of the so-called natural ones like Tom's and Jason, but they left me stinky too soon (before the end of a workday--yike). I'd like to try going at least without shampoo in the future.

DERMACOP will remove any armpit smell, it's deodorant powder works amazingly
 

It's a deodorant powder by dermacop, uarmsol works the best without clogging or preventing sweating, no odour masking and no chemicals.

Apparently, if people sweat that bad, you clamp your T4 or T5 nerve (this has to be done by a surgeon, just in case someone thought about getting their bulldog clips out!) but you can stop sweating under your armpits. Save son buying deodarant! Link Here

Every person I have met who says "I just don't need deodorant," really, really did.

With my wife's prompting, I started using a deodorant crystal (bare crystal at home, roll-on style for travel) and it's worked great. No shirt stains that I can see, no extra gunk like those gel antiperspirants. You wouldn't even know it was there if it weren't for the lack of smell.

I actually dumped all deodorants. I haven't used any in many months. Purell Hand Sanitizer is the best damn deodorant on this side of the Milky Way. Works a whole lot better than any deodorant I ever used before. I reapply once a day.

Cool, a zombie thread.

I've used the Crystal Stick for many years and really like it. The stick itself lasts a long time, too.

I use the rollers and make sure to switch them periodically. Call me crazy, but if I use the same time for too long I swear it loses effectiveness. An added benefit, other than them working well is that they are both small and light. Small enough in fact, to go in a saddle bag for example.

Resurrected by a Dermacop™ shill, no less. :D

Zombie thread just made me spend $8 on Amazon for a deodorant rock, lol. We will see how it works...

It's amazing how insensitive you are to the smell of your own sweat.