what if I used sour paint on my walls?
Honestly you might be re-drywalling the whole room.  If you smell sour that is basically mold.  If you can smell it then it must be producing mold in the air which affects your family.  So you have two choices:


Tear down drywall and start over.
Go through a grueling process of using lacquer and paint removal products that are just horrible.  And now you have two more coats on top of it.  This will make your whole house smell and is just and absolute mess.  And the kicker, you could do this and still have smell problems.


Obviously using the paint was really dumb.  My rule is if I have to ask myself if I should use something or not, I don't unless a pro or research says its OK.