depends on how many layers of the dermal envelope were compromised
My child burned a face with boiling water, whilst we were in Kazakhstan - so I put them in a cold shower for 20 minutes. Much screaming, due the cold, but that made it a superficial burn. An exaggerated amount of cooling, for as long as possible, (much longer that you might think) is my best treatment - but that is directly post-burn.
I'd still suggest you see a doc or at least a chemist, there might be some magic stuff that they can splurge