Unsure of where you are going with this and what you mean by liquid? Are you asking about what brands of diaper creams we use? What brands work best? and by liquid, are you asking if we wash off after a diaper change or if we just apply more cream.
I use a brand called Zincofax, it's a fairly standard diaper cream with zinc in it. I find zinc-based rash creams are the best as both a preventative measure and for treating a fresh rash. Fortunately, I haven't had a rash in years (knock on wood), so I don't use my cream to soothe and treat rashes as much anymore, I just use my diaper cream as a precaution.
I always apply a light coat of diaper cream and baby powder before I tape up. When I change, I always use moist wipes and I'll usually hop in the shower or the bath to get everything all fresh. When I throw on another diaper, I put on more cream and powder. Rinse, wash, repeat, you get the picture.