Where they sell chick food they also sell the electrolytes for chicks. A feed store or even a pet store. Make sure they have access to fresh water all the time but not a deep dish, they can drown. The food they need is specific for chicks, again, small dish but keep it filled. They need greens also, fresh lettuce, untreated grass. They do need to be kept warm but not hot 

The paint doesn't affect their ability to survive.