If my son peed on me during a spanking I would put him in a diaper and treat him like a toddler.
I would take him out in public wearing just a diaper and shirt shoes.
I would make my son wear diapers all the time as long as he lived with me and he would no longer be allowed to use the toilet.
When it's warm out or we're at home he will only wear just a diaper and shirt and he will be home schooled so he will remain in diapers.
The toilet would be off limits to him and I would change him when it's time and he would not be allowed to ask for a diaper change.
He would also have sit in a high chair and be in a child car seat and drink from a bottle, be changed in front of others, play outside in just a diaper etc.
He would also sleep in a crib as well.
I would make my son wear diapers and keep him a diaper boy like the cute diaper boy in the pictures below.