Abreeze said:
How often must one apply barrier cream and powder? And how quickly must you get out of a diaper to avoid a rash?
Just apply during each fresh change, though barrier cream will be a little more work after each change(see stuff below). And try any of these near the tapes/taping surfaces. Powder will pretty much make the tapes useless if you do, same goes for barrier creams.
Wearing times will vary depending on a few factors(also below)
Both have their up/downsides and it depends on your use case.
Powder
If you're gonna use them for occasional wetting and for shorter wearing periods(not going to sit in a totally soaked and messy diaper for many many hours), powder should probably be enough depending on how hydrated you're staying and/or how sensitive your skin is.
Also helps if you tend to get a little sweaty in that area, helps keep things feeling a little cooler but
does not seal out wetness. Just don't use way too much otherwise you'll end up making powder mud which might negatively impact absorbency.
Barrier Creams/Ointments
If you're intending to mess or going to stay in a wet and/or messy diaper for longer periods, I'd absolutely recommend using some type of a barrier cream.
Helps reduce the chance of diaper rash and
does seal out most wetness but is a little more difficult to clean up during changes.
A barrier cream will do a much better job of protecting your skin from rash/breakdown if you intend to sit in it longer than a few hours(which I don't recommend), especially if you have sensitive skin.
It's usually a thicker paste, some pastes/ointments will be thinner/thicker than others and easier/harder to get off skin so cleaning it off might be a bit of an annoyance for every change. You might want to try some vinyl/nitrile/medical gloves for a few applications to practice cause it does tend stick to the hands pretty effectively and gloves do make the application/cleanup process way easier imo, otherwise scrub your hands off or use a few baby wipes before you go tape up to remove as much off your hands as you can. Avoid getting it on tapes/taping surfaces.
Personally if you're going to be using diapers fully, for wetting and messing, don't risk it. Save yourself the pain of developing a bad rash and use a some kind of barrier cream for extended wear sessions. I'm sure many here will agree, rashes are no fun.
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Also Megamax are a very good diaper in general, as a starter they might spoil you for most other diapers, might wanna sample them to get the fit right as they run very slightly bigger than usual sizing.
Hope this helps a little, have any more questions just ask.