@ Vestalm and others
I've used A & D ointment most of the time. Desitin on occasion. With that applied after showering, I've had few skin problems, even in warm summer weather.
Zinc Oxide is the standby generic.
And good old Vaseline will work, too!
If you use disposable diapers, the ointments can render your tapes useless if it gets on the landing zone.
Many of the ointments also deteriorate plastic or rubber pants quickly. Hospital grade butyl rubber (hard to find) will resist moisture barrier products as well as the rather pricey 'Euroflex' waterproof pants & bloomers.
If you are not allergic to talcum powder, that can help if applied to your skin sparingly. It also tends to mask any odors and can be used on vinyl or rubber protective pants to keep them from sticking when not used.
I've noted that the mail order incontinence outlets often sell their own 'house brand' of moisture barrier creams / ointments.
And there are aloe wipes, too. Very skin friendly.
Trial and error will lead you to the product that works most effectively.
@ Patrick: I agree on the shaving for hygienic reasons and also your advice on moisture barrier creams as a preventitive more than a curative. I always advise medical intervention for a persistent rash condition.
Check the @PROTEX comment above, too, for their suggestions moisture barrier applications.